CN112114403B - Calibration method, device and equipment for optical switch and computer readable storage medium - Google Patents
Calibration method, device and equipment for optical switch and computer readable storage medium Download PDFInfo
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- CN112114403B CN112114403B CN202011007125.9A CN202011007125A CN112114403B CN 112114403 B CN112114403 B CN 112114403B CN 202011007125 A CN202011007125 A CN 202011007125A CN 112114403 B CN112114403 B CN 112114403B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
- G02B6/3512—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
- G02B6/3518—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/3586—Control or adjustment details, e.g. calibrating
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Abstract
The invention discloses a calibration method, a calibration device, calibration equipment and a computer readable storage medium of an optical switch, wherein the optical switch comprises an optical fiber array, a collimating lens and an MEMS (micro-electromechanical system) reflector; the method comprises the following steps: sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of a first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel; determining a scaled voltage for the first output channel based on the initial voltage value and an adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
Description
Technical Field
The embodiment of the invention relates to the technical field of optical fibers, in particular to a calibration method, a device, equipment and a computer readable storage medium of an optical switch.
Background
At present, the MEMS optical switch of the micro-motor system is insensitive to polarization and low in power consumption due to low insertion loss, and the occupancy rate of the MEMS optical switch is higher and higher in the market of the whole optical switch. Mature MEMS optical switches are known as 1x2,1x4,1x8,1x16. In recent years, the MEMS optical switch is developed towards more channels, and the market demand for 1x32,1x48,1x64, and 1x128 optical switches is increasing. The MEMS optical switch calibration algorithm of the low port mainly adopts a traversing mode to carry out coarse calibration and a stepping gradient descent method to carry out fine calibration, and when the port is low, the calibration time is not influenced, but the calibration time is exponentially increased along with the increase of the number of channels. There is currently no effective solution to this problem.
Disclosure of Invention
Accordingly, the present invention is directed to a method, apparatus, device and computer readable storage medium for calibrating an optical switch, which at least partially solve the above-mentioned problems.
In order to achieve the above objective, an embodiment of the present invention provides a calibration method for an optical switch, where the optical switch includes an optical fiber array, a collimating lens, and a MEMS mirror of a micro-electromechanical system; the method comprises the following steps:
Sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of a first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel;
determining a scaled voltage for the first output channel based on the initial voltage value and an adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
In the above scheme, the sequentially inputting the plurality of voltages to the optical switch to obtain the initial voltage value of the first output channel includes:
after a preset first voltage is input to the optical switch, sequentially changing the input voltage input to the optical switch by adopting a first voltage stepping value, and adjusting the position of the MEMS reflector according to the position of the collimating lens so that the MEMS reflector scans all outer-layer optical fibers of the optical fiber array respectively, and fixing the position of the MEMS reflector;
Obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens;
after a preset second voltage is input to the optical switch, changing the input voltage input to the optical switch by sequentially adopting a first voltage stepping value based on the relative position relation, so that the MEMS reflecting mirrors respectively scan optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array, and the insertion loss of the first output channel after each scanning is obtained;
and determining the minimum value of the insertion loss of the first output channel in the scanning process of the MEMS reflector, and taking a voltage value corresponding to the minimum value of the insertion loss as an initial voltage value.
In the above aspect, the determining the scaled voltage of the first output channel based on the initial voltage value and the adjustable second voltage step value includes:
obtaining the adjustable second voltage step value based on the initial voltage value and a preset second voltage step;
and updating the initial voltage value according to the adjustable second voltage stepping value to obtain the scaling voltage of the first output channel.
In the above solution, the obtaining the adjustable second voltage step value based on the initial voltage value and a preset second voltage step includes:
And fixing an initial voltage value of a first axis under a two-dimensional coordinate system, and changing input voltage input to the optical switch by sequentially adopting a preset second voltage stepping value based on the initial voltage value of a second axis to obtain the variation of the insertion loss of the first output channel.
And adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain the adjustable second voltage stepping value.
In the above solution, the updating the initial voltage value according to the adjustable second voltage step value to obtain the scaled voltage of the first output channel includes:
and under the condition that the direction of the variation of the insertion loss is changed, updating the initial voltage of the second shaft based on the adjustable second voltage step value and the direction of the variation of the insertion loss, and obtaining the scaling voltage of the first output channel second shaft.
In the above solution, the step of changing the input voltage to the optical switch by sequentially using a preset second voltage step value based on the initial voltage of the second shaft to obtain the variation of the insertion loss of the first output channel includes:
changing input voltage input to the optical switch by adopting a preset second voltage stepping value in sequence in positive and negative directions according to the initial voltage of the second shaft, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively;
And determining the variation of the insertion loss of the first output channel according to the insertion losses.
In the above scheme, the method further comprises:
detecting whether the scaling voltage meets a preset condition;
and determining the scaling voltage of the first output channel again based on the initial voltage value and the adjustable second voltage step value under the condition that the scaling voltage does not meet the preset condition.
The embodiment of the invention also provides a calibration device of the optical switch, which comprises an optical fiber array, a collimating lens and an MEMS reflector; the device comprises: an obtaining unit and a determining unit, wherein:
the obtaining unit is used for sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of the first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel;
the determining unit is used for determining the scaling voltage of the first output channel based on the initial voltage value and an adjustable second voltage stepping value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
In the above scheme, the obtaining unit is further configured to sequentially change an input voltage input to the optical switch by using a first voltage step value after inputting a preset first voltage to the optical switch, adjust a position of the MEMS mirror according to a position of the collimating lens, so that the MEMS mirror scans all outer optical fibers of the optical fiber array respectively, and fix a position of the MEMS mirror; obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens; after a preset second voltage is input to the optical switch, changing the input voltage input to the optical switch by sequentially adopting a first voltage stepping value based on the relative position relation, so that the MEMS reflecting mirrors respectively scan optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array, and the insertion loss of the first output channel after each scanning is obtained; and determining the minimum value of the insertion loss of the first output channel in the scanning process of the MEMS reflector, and taking a voltage value corresponding to the minimum value of the insertion loss as an initial voltage value.
In the above aspect, the determining unit includes: obtaining a subunit and an updating subunit, wherein:
the obtaining subunit is configured to obtain the adjustable second voltage step value based on the initial voltage value and a preset second voltage step;
the updating subunit is configured to update the initial voltage value according to the adjustable second voltage step value, and obtain a scaling voltage of the first output channel.
In the above scheme, the obtaining subunit is further configured to fix an initial voltage value of the first axis in the two-dimensional coordinate system, and change an input voltage input to the optical switch by sequentially adopting a preset second voltage step value based on the initial voltage value of the second axis, so as to obtain a variation of the insertion loss of the first output channel; and adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain the adjustable second voltage stepping value.
In the above scheme, the updating subunit is further configured to update the initial voltage of the second axis based on the adjustable second voltage step value and the direction of the variation of the insertion loss, to obtain the scaled voltage of the first output channel second axis when the direction of the variation of the insertion loss changes.
In the above scheme, the obtaining subunit is further configured to sequentially change, according to the initial voltage of the second shaft, an input voltage input to the optical switch by using a preset second voltage step value in a positive-negative direction, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively; and determining the variation of the insertion loss of the first output channel according to the insertion losses.
In the above solution, the apparatus further includes: a detection unit for detecting whether the scaling voltage meets a preset condition; and determining the scaling voltage of the first output channel again based on the initial voltage value and the adjustable second voltage step value under the condition that the scaling voltage does not meet the preset condition.
The embodiment of the invention also provides a calibration device of the optical switch, which comprises: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is adapted to perform the steps of the method described above when the computer program is run.
Embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by at least one processor, performs the steps of the method described above.
The embodiment of the invention provides a method, a device, equipment and a computer readable storage medium for calibrating an optical switch, wherein the method comprises the following steps: sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of a first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel; determining a scaled voltage for the first output channel based on the initial voltage value and an adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel. In the embodiment of the invention, the initial voltage value of the first output channel is obtained by sequentially inputting a plurality of voltages to the optical switch, and the scaling voltage of the first output channel is determined based on the initial voltage value and the adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value, so that the calibration time of the MEMS optical switch can be greatly shortened, and the calibration efficiency of the MEMS optical switch is improved.
Drawings
Fig. 1 is a schematic flow chart of a calibration method of an optical switch according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical switch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an optical switch for testing according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an input voltage provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a calibration device of an optical switch according to an embodiment of the present invention;
fig. 6 is a schematic hardware structure of a scaling device of an optical switch according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the specific technical solutions of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
Fig. 1 is a schematic flow chart of a calibration method of an optical switch according to an embodiment of the present invention. The optical switch comprises an optical fiber array, a collimating lens and a MEMS reflector; the method comprises the following steps:
S101: sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of a first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel.
S102: determining a scaled voltage for the first output channel based on the initial voltage value and an adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
In this embodiment, the optical switch may be any optical switch, which is not limited herein. As one example, the optical switch may be a microelectromechanical system (MEMS) optical switch that includes an array of optical fibers, a collimating lens, and a MEMS mirror.
The first output channel is an output channel corresponding to any optical fiber of the optical fiber array, and in practical application, the first output channel may be understood as a current output channel corresponding to any optical fiber of the optical fiber array.
For convenience of understanding, a schematic structural diagram of an optical switch is illustrated in this embodiment, and fig. 2 is a schematic structural diagram of an optical switch provided by an embodiment of the present invention, and as shown in fig. 2, the optical switch includes an optical fiber array 21, a collimating lens 22, and a mems mirror 23, where the optical fiber array may be any optical fiber array, and by way of example and not limitation, the optical fiber array may be a two-dimensional optical fiber array, and the two-dimensional optical fiber array may be an optical fiber array of MxN. The optical switch can control the MEMS reflector to rotate by applying voltage to the MEMS reflector, so that any light reflected in the optical fiber array can enter any output channel.
The calibration method of the optical switch can be used in the process of calibrating the optical switch, for convenience of understanding, a schematic structural diagram of the optical switch for testing is illustrated herein, fig. 3 is a schematic structural diagram of the optical switch for testing provided by the embodiment of the present invention, and as shown in fig. 3, 31 represents a light source, 32 represents the optical switch, 33 represents a multichannel power meter, 34 represents a driving board, and 35 represents an upper computer. The optical switch 32 may be connected to the light source 31, the multichannel power meter 33, and the driving board 34, and the host computer 35 may be connected to the multichannel power meter 33, and the driving board 34, respectively. In practical application, the driving board 34 may be controlled by the upper computer 35 to drive and scale the optical switch through voltage, and the upper computer 35 may be any upper computer, which is not limited herein, and as an example, the upper computer may be a personal computer (Personal Computer, PC).
In this embodiment, the plurality of voltages obtain, based on a preset voltage and a first voltage step value, a voltage which can be understood as a voltage which is input to the optical switch for the first time, and then sequentially change the voltage which is input to the optical switch by the first voltage step value, so as to obtain a plurality of voltages, where the preset voltage can be determined according to practical situations, and is not limited herein, and as an example, the preset voltage can be understood as a voltage which is input to the optical switch for the first time, and the preset voltage can be any voltage from 0v to 60 v; the first voltage step value may be determined according to actual situations, and is not limited herein, and as an example, the first voltage step value is a large step voltage value and may be any value between 0.7 and 2V, and the first voltage step value may be understood as a voltage difference between a current input voltage and a previous voltage. In practical applications, the voltage input to the optical switch may be first set to a preset voltage, and then the voltage input to the optical switch may be sequentially increased and/or decreased by a first voltage step value to obtain a plurality of voltages, for example, the preset voltage is 30v, the first voltage step value is 1v, and the plurality of voltages may be 30v, 31v, 32v, … …; or the plurality of voltages may be 30v, 29v, 28v, … …. This process can be understood as a loop or ring-shaped coarse scan or a fast scan in large steps.
Sequentially inputting a plurality of voltages to the optical switch, wherein the obtaining of the initial voltage value of the first output channel may be sequentially inputting a plurality of voltages to the optical switch, recording insertion loss values corresponding to all output channels corresponding to each voltage input to the optical switch, and determining the initial voltage value of the output channel corresponding to any optical fiber in all output channels based on the insertion loss values corresponding to all output channels corresponding to each voltage input to the optical switch; the initial voltage value can be understood as a voltage estimated value of an output channel corresponding to any optical fiber in all the output channels after rough scanning is completed.
The adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value, the change amount of the insertion loss of the first output channel can be determined according to the insertion loss of the first output channel, and then the adjustable second voltage step value is determined according to the change amount of the insertion loss of the first output channel and the initial voltage value.
Determining the scaled voltage of the first output channel based on the initial voltage value and the adjustable second voltage step value may be understood as updating the scaled voltage of the first output channel in real time based on the initial voltage value and the adjustable second voltage step value to find an optimal scaled voltage.
The scaling voltage is used to scale the optical power corresponding to the first output channel, which can be understood as the scaling voltage is used for the multichannel power meter to output the optical power corresponding to the first output channel.
For ease of understanding, the fiber array is illustrated herein as a two-dimensional fiber array, and the optical switch receives light from one fiber of the two-dimensional fiber array, converges on the MEMS mirror through the collimating lens, and enters the corresponding exit channel through reflection by the MEMS mirror. In practical application, the angle of the MEMS reflecting mirror determined by the rough sweep has a certain deviation from the actual angle.
Taking one channel as an example in the process of fine scanning of the optical switch, U is obtained in the process of rough scanning X And U Y The vicinity is fine tuned such that the IL of the current channel is minimal.
The angle deviation of the optical switch can be simulated and analyzed through Gaussian beam matrix transmission change on an optical path. The relation between the insertion loss IL of the output channel and the angle deviation θ of the MEMS mirror angle from the actual angle is calculated to satisfy the following expression (1), which is simplified as follows since the angle of use of the optical switch is relatively small. Where ω refers to the beam waist radius of the gaussian beam emerging from the entrance fiber after transformation by the collimating lens. Lambda is the wavelength. The relationship between the insertion loss IL of the output channel and the angle deviation θ of the MEMS mirror angle from the actual angle is a quadratic function, as shown in the following expression (1):
The MEMS mirror can be driven by the voltage of the X axis and the voltage of the Y axis, and is controlled to rotate in the two-dimensional direction. The correspondence between driving voltage and rotation angle is also different for different chip designs. For convenience of explanation, take the simplest chip as an example, the rotation angle θ Rotation The approximately linear relationship with the driving voltage U satisfies the following expression (2):
θ rotation =kU (2)
Where k is a constant.
The algorithm described in this embodiment is applicable to the response curves of all optical switches. Total rotation angle θ in spatial coordinate system Rotation And a rotation angle theta in the X direction x Rotation angle in Y directionDegree θ y The relationship of (c) satisfies the following expression (3):
since the angle required for the switch is relatively small, the following expression (4) can be approximated:
in the case where the driving voltage U is driven by the voltage of the X axis and the voltage of the Y axis, the above expression (2) can be expressed as the following expression (5):
the MEMS optical switch fine scanning process takes a channel as an example, and assumes that the chip angle required by the channel is theta Target object By combining the above expressions (1) and (5), the relationship between the insertion loss IL and the rotation angle can be directly converted to satisfy the following expressions (6) and (7):
due to MEMS optical switch θ Target object Generally within 5 degrees, the corresponding radian is less than 0.09; the above relationship of IL and voltage can be simplified to the following expression (8):
the following expression (9) can be obtained by taking the gradient of the above expression (8):
from the above expression (9), the voltage step value (ΔU x 、ΔU y ) And a varying insertion loss Δil and a current voltage (U x 、U y ) In relation, therefore, it is possible to determine the current voltage value (U based on the change value ΔIL of IL x 、U y ) Time adjustment voltage step value (DeltaU) x 、ΔU y )。
In the embodiment of the invention, the initial voltage value of the first output channel is obtained by sequentially inputting a plurality of voltages to the optical switch, and the scaling voltage of the first output channel is determined based on the initial voltage value and the adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value, so that the calibration time of the MEMS optical switch can be greatly shortened, and the calibration efficiency of the MEMS optical switch is improved.
In an optional embodiment of the present invention, the sequentially inputting a plurality of voltages to the optical switch, obtaining an initial voltage value of the first output channel includes: after a preset first voltage is input to the optical switch, sequentially changing the input voltage input to the optical switch by adopting a first voltage stepping value, and adjusting the position of the MEMS reflector according to the position of the collimating lens so that the MEMS reflector scans all outer-layer optical fibers of the optical fiber array respectively, and fixing the position of the MEMS reflector; obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens; after a preset second voltage is input to the optical switch, changing the input voltage input to the optical switch by sequentially adopting a first voltage stepping value based on the relative position relation, so that the MEMS reflecting mirrors respectively scan optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array, and the insertion loss of the first output channel after each scanning is obtained; and determining the minimum value of the insertion loss of the first output channel in the scanning process of the MEMS reflector, and taking a voltage value corresponding to the minimum value of the insertion loss as an initial voltage value.
In this embodiment, each output channel of the optical switch is mainly considered to have corresponding X-axis and Y-axis voltage values. Due to the fact that arrangement of the two-dimensional optical fiber array in the MEMS optical switch is not standard and the position relation of internal components in the manufacturing process, the voltage relation diagram corresponding to the output channel is not standard, and measures are taken.
It should be noted that, the "preset first voltage" and the "preset second voltage" herein may be determined according to actual situations, and are not limited herein. As an example, the preset first voltage may be 1v; the preset second voltage may be 30v.
The step of sequentially changing the input voltage to the optical switch by using the first voltage step value after inputting the preset first voltage to the optical switch may be that after inputting the preset first voltage to the optical switch, the step of sequentially increasing the input voltage to the optical switch by using the first voltage step value or the step of sequentially decreasing the input voltage to the optical switch by using the first voltage step value after inputting the preset first voltage to the optical switch. For convenience of understanding, herein, it is assumed that the preset first voltage is 1v, the first voltage step value is 1v, and after the 1v voltage is input to the optical switch, the input voltages sequentially input to the optical switch by sequentially changing the 1v voltage step value may be 2v, 3v, 4v, … …. This process can be understood as a loop or ring-shaped coarse scan.
The positions of the MEMS reflectors are adjusted according to the positions of the collimating lenses, so that the MEMS reflectors are respectively scanned to all outer layer optical fibers of the optical fiber array, the positions of the MEMS reflectors are fixed, namely, the centers of the optical fiber array, the collimating lenses and the MEMS reflectors in the optical switch are possibly not on the same axis, so that a voltage relation diagram corresponding to an input channel is not standard, through inputting voltage to the optical switch from the outer layer to the inner layer in a spiral mode, the positions of the MEMS reflectors are adjusted according to the central positions of the collimating lenses, so that the MEMS reflectors are respectively scanned to all outer layer optical fibers of the optical fiber array, the positions of the MEMS reflectors are fixed, the outer ring channels corresponding to all outer layer optical fibers of the optical fiber array can be quickly found in the test process, time consumption in the redundant positions of the outer ring channels is avoided, the process can be completed in the manufacturing process of the switch, after the preset first voltage is input to the optical switch, the first voltage value is sequentially adopted to step the input voltage to the optical switch from the outer layer to the inner layer in a spiral mode.
Obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens; the relative position relationship is a coaxial relationship of the optical fiber array, the collimating lens and the MEMS reflector, namely the centers of the optical fiber array, the collimating lens and the MEMS reflector are on the same straight line.
After the preset second voltage is input to the optical switch, based on the relative position relation, the input voltage input to the optical switch is changed by sequentially adopting a first voltage stepping value, so that the MEMS reflecting mirror scans optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array respectively, the insertion loss of the first output channel after each scanning is obtained can be that after the preset second voltage is input to the optical switch, the input voltage input to the optical switch is increased or reduced by sequentially adopting the first voltage stepping value based on the fixed relative position relation, so that the MEMS reflecting mirror scans the optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array respectively, and the insertion loss of the first output channel after each scanning is obtained. For convenience of understanding, herein, it is assumed that the preset second voltage is 3v, the first voltage step value is 1v, and after the 30v voltage is inputted to the optical switch, the input voltage sequentially inputted to the optical switch by sequentially changing the 1v voltage step value may be 31v, 32v, 33v, … ….
In practical applications, the input voltage of the optical switch is generally a voltage applied in the X-axis direction and the Y-axis direction, and for convenience of understanding, an input voltage schematic diagram provided by an embodiment of the present invention is illustrated herein, fig. 4 is an input voltage schematic diagram provided by an embodiment of the present invention, and as shown in fig. 4, 41 represents an output channel corresponding to an optical fiber array of MxN, 42 represents a voltage applied in the X-axis direction corresponding to each output channel, and 43 represents a voltage applied in the Y-axis direction corresponding to each output channel. In the manufacturing process of the optical switch, a preset first voltage applied in the X-axis direction and the Y-axis direction can be set to be 0v, a first voltage stepping value is set to be 1v, the voltage applied in the X-axis direction is kept unchanged, the voltage applied in the Y-axis direction is changed from 0v, 1v, 2v, 3v, … … and 60v, the voltage applied in the Y-axis direction is kept unchanged, the voltage applied in the X-axis direction is changed from 60v, 59v, 58v, 57v, … … and 0v, the first voltage stepping value is adopted to input the voltage of the optical switch from the outer layer to the inner layer in a spiral mode, and the like, so that the MEMS reflector scans all outer layer optical fibers of the optical fiber array respectively, the positions of the MEMS reflector are fixed, and the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector is determined; the relative position relation can be convenient for finding out the outer ring channels corresponding to all outer layer optical fibers of the optical fiber array in the test process, and time consumption in redundant positions of the outer ring channels is avoided.
In the test calibration process of the optical switch, a preset first voltage applied in the X-axis direction and the Y-axis direction can be set to be 30v, a first voltage stepping value is set to be 1v, the voltage applied in the X-axis direction is kept unchanged, the voltage applied in the Y-axis direction is reduced by 1v to 29v from 30v, the voltage applied in the Y-axis direction is kept unchanged, the voltage applied in the X-axis direction is reduced by 1v to 29v … … from 30v, the first voltage stepping value is sequentially adopted to input the voltage of the optical switch which is spirally wound from the inner layer to the outer layer, and the like is omitted, so that the MEMS reflector is respectively scanned to optical fibers which are spirally wound from the inner layer to the outer layer in the optical fiber array, the insertion loss of the first output channel is obtained, the outer ring channels corresponding to all outer layer optical fibers of the optical fiber array can be quickly found in the test process, the redundant time consumption in the positions of the channels is avoided, the efficiency is high, and the time is short.
In an alternative embodiment of the present invention, the determining the scaled voltage of the first output channel based on the initial voltage value and the adjustable second voltage step value includes: obtaining the adjustable second voltage step value based on the initial voltage value and a preset second voltage step; and updating the initial voltage value according to the adjustable second voltage stepping value to obtain the scaling voltage of the first output channel.
In this embodiment, the obtaining the adjustable second voltage step value based on the initial voltage value and the preset second voltage step may be that, based on the initial voltage value, the input voltage to the optical switch is changed by sequentially adopting the preset second voltage step value, so as to obtain the magnitude and the direction of the variation of the insertion loss of the first output channel; and adjusting the preset second voltage stepping value according to the initial voltage value and the variation amount to obtain the adjustable second voltage stepping value. The initial voltage value may be a magnitude value of an initial voltage, and in a two-dimensional coordinate system, the initial voltage value may be voltages of an x-axis and a y-axis.
The initial voltage value is updated according to the adjustable second voltage step value, and the scaling voltage of the first output channel is obtained by updating the initial voltage value based on the adjustable second voltage step value under the condition that the variation direction is changed.
It should be noted that, in the embodiment of the present invention, the preset second voltage step value may be determined according to an actual situation, which is not limited herein. The preset second voltage step value is smaller than the first voltage step value. As an example, the preset second voltage step value may be 0.1 to 0.5V, which may be understood as a fixed small step value, and may be denoted as u step 。
Based on the initial voltage value, sequentially adopting preset valuesThe second voltage step value may be used to change the input voltage to the optical switch when the initial voltage value is preset, and the input voltage to the optical switch is changed by using the preset second voltage step value. As an example, the initial voltage value may be noted as U Initial value The preset second voltage step value can be recorded as u step The input voltage to the optical switch is changed by adopting a preset second voltage step value in the initial voltage value accessory in sequence, and the input voltage can be from U Initial value -n 1 u step To U (U) Initial value +n 2 u step An input voltage to the optical switch, where n 1 ,n 2 The value range of (2) is 2-10, and n is further obtained 1 +n 2 The +1 voltages correspond to the IL value of the current channel, the IL value of the current channel is subtracted from the IL value of the current channel at the last time to obtain the variation of the insertion loss of the first output channel, and if the magnitude of the variation is larger than zero, the direction of the variation is positive (1); if the magnitude of the variation is less than zero, the direction of the variation is negative (-1). Then according to the variation of IL and the current voltage value, the preset second voltage step value u is adjusted step Obtaining an adjustable second voltage step value, which can be noted as u step-change The second voltage step value adjustable in practical application can be obtained by the following expression (10):
u step-change =ηΔIL×U (10)
Wherein, eta represents a linear scaling factor, and the value range is generally: 1-7 x10-3, wherein DeltaIL is the variation of the insertion loss of the first output channel, U can be the initial voltage value of the first output channel, or the updated initial voltage value of the first output channel, namely the current voltage value of the first output channel.
Equation (10) may be iterated until the iteration is stopped in the case where the direction of the IL variation is changed, and the initial voltage value is updated based on the adjustable second voltage step value to obtain a scaled voltage of the first output channel, where the scaled voltage isCan be recorded as U 1 The following expression (11):
U 1 =U±u step-change (11)
Where + -represents the direction of the amount of change in insertion loss of the first output channel.
In an alternative embodiment of the present invention, the obtaining the adjustable second voltage step value based on the initial voltage value and a preset second voltage step includes: and fixing an initial voltage value of a first axis under a two-dimensional coordinate system, and changing input voltage input to the optical switch by sequentially adopting a preset second voltage stepping value based on the initial voltage value of a second axis to obtain the variation of the insertion loss of the first output channel. And adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain the adjustable second voltage stepping value.
It should be noted that, in the embodiment of the present invention, the two-dimensional coordinate system may be an x-axis coordinate system and a y-axis coordinate system, the first axis may be an x-axis coordinate system or a y-axis coordinate system, and the second axis may be a y-axis coordinate system or an x-axis coordinate system. For ease of understanding, the initial voltage value of the x-axis in the two-dimensional coordinate system is denoted as U Initial value of x The initial voltage value of the y-axis is recorded as U Initial value of y Wherein U is Initial value of x ,U Initial value of y It can be understood that the inaccurate voltage value of the first output channel scaling voltage is obtained by coarse scanning based on the preset voltage and the first voltage step value.
The method comprises the steps of fixing an initial voltage value of a first shaft under a two-dimensional coordinate system, changing an input voltage input to the optical switch by sequentially adopting a preset second voltage step value based on the initial voltage value of a second shaft, wherein the initial voltage value of one shaft is fixed to be a determined value under the two-dimensional coordinate system, and then changing the input voltage input to the optical switch by sequentially adopting the preset second voltage step value at an initial voltage value accessory of the other shaft, namely, adjusting the voltage of the other shaft.
In an alternative embodiment of the present invention, said updating said initial voltage value according to said adjustable second voltage step value to obtain a scaled voltage of the first output channel comprises: and under the condition that the direction of the variation of the insertion loss is changed, updating the initial voltage of the second shaft based on the adjustable second voltage step value and the direction of the variation of the insertion loss, and obtaining the scaling voltage of the first output channel second shaft.
In the embodiment of the present invention, the direction of the variation of the insertion loss changes to the surface that the trend of the variation of the insertion loss changes, for example, the trend of the variation of the insertion loss may suddenly become larger from a smaller trend or suddenly become smaller from a larger trend.
Updating the initial voltage of the second shaft based on the adjustable second voltage step value and the direction of the variation of the insertion loss, and obtaining the scaled voltage of the second shaft of the first output channel may be obtaining a new initial voltage of the second shaft according to the initial voltage of the second shaft, the adjustable second voltage step value and the direction of the variation of the insertion loss, that is, updating the initial voltage of the second shaft, and obtaining the scaled voltage of the second shaft of the first output channel.
In an optional embodiment of the present invention, the changing the input voltage to the optical switch based on the initial voltage of the second shaft sequentially using a preset second voltage step value to obtain the variation of the insertion loss of the first output channel includes: changing input voltage input to the optical switch by adopting a preset second voltage stepping value in sequence in positive and negative directions according to the initial voltage of the second shaft, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively; and determining the variation of the insertion loss of the first output channel according to the insertion losses.
In this embodiment, changing the input voltage to the optical switch according to the initial voltage of the second shaft sequentially in the positive and negative directions by using a preset second voltage step value, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively; the positive and negative directions are positive or negative directions of the second axis, and when the second axis is the x axis, the positive and negative directions are positive or negative directions of the x axis; when the second axis is the y-axis, the positive and negative directions are the positive direction of the y-axis or the negative direction of the y-axis.
For convenience of understanding, the input voltage to the optical switch may be 29.5v, 30v, 30.5v, 31v, etc. by sequentially changing the preset second voltage step value in the positive and negative directions according to the initial voltage of the second shaft, assuming that the initial voltage of the second shaft is 30v and the preset second voltage step value is 0.5 v.
For easy understanding, a practical application is also illustrated, in which case, first, the voltage value in the X direction is fixed to be U Initial value of x Then sequentially adopting a preset second voltage step value u step Changing the input voltage to the optical switch, e.g. from U Initial value of y -n 1 u step To U (U) Initial value of y +n 2 u step Obtaining n 1 +n 2 The +1 voltages correspond to the IL values of the current channel, if IL is a decreasing trend, that is, the difference between the IL value of the current channel and the IL value of the current channel is greater than zero, the direction of the IL variation is positive (1), if IL is a increasing trend, that is, the difference between the IL value of the current channel and the IL value of the current channel is less than zero, the direction of the IL variation is negative (-1); in practice, the direction of the IL variation can be understood as the direction of the Y axis, denoted Y dircetion The method comprises the steps of carrying out a first treatment on the surface of the Other cases are 0; wherein u is step The general value range of (2) is 0.1-0.05V; wherein n is 1 ,n 2 The value range of (2) is 2-10; in the feedback type variable stepping fine scanning process, the direction of the Y axis is obtained and is not 0, firstly, a preset second step u is used step The power-on adjustment is carried out along the Y-axis direction, the subsequent stepping value is adjusted according to the variation of IL and the current voltage value, u step-Variable =ηΔIL×U y Continuously iterating until the iteration is stopped under the condition that the direction of the IL variation is changed, U y1 =U y +Y dircetion u step-change Updating the current Y-axis voltage value to U y1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein eta represents a linear scaling factor, and the range of values is generally: 1-7 x10-3.
In another case, the voltage value in the y direction is fixed to be U Initial value of y Then sequentially adopting a preset second voltage step value u step Changing the input voltage to the optical switch, e.g. then taking a preset second voltage step value u in turn step Changing the input voltage to the optical switch from U Initial value of x -n 1 u step To U (U) Initial value of x +n 2 u step Obtaining n 1 +n 2 The +1 voltages correspond to the IL values of the current channel, if IL is a decreasing trend, that is, the difference between the IL value of the current channel and the IL value of the current channel is greater than zero, the direction of the IL variation is positive (1), if IL is a increasing trend, that is, the difference between the IL value of the current channel and the IL value of the current channel is less than zero, the direction of the IL variation is negative (-1); in practice, the direction of the IL variation can be understood as the direction of the Y axis, denoted Y dircetion The method comprises the steps of carrying out a first treatment on the surface of the Other cases are 0; wherein u is step The general value range of (2) is 0.1-0.05V; wherein n is 1 ,n 2 The range of the value of (2) to (10). In the feedback type variable stepping fine scanning process, the direction of the X axis is obtained and is not 0, firstly, a preset second step u is used step The power-on adjustment is carried out along the X-axis direction, the subsequent stepping value is adjusted according to the variation of IL and the current voltage value, u step-change =ηΔIL×U x Iteration is continued until the direction of the IL variation changes, namely U x1 =U x +X dircetion u step-change Until the iteration of IL enlargement stops, updating the voltage value of the current X axis to U x1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein eta represents a linear scaling factor, and the range of values is generally: 1 to 7x10 -3 。
In the feedback type variable stepping fine scanning process, a new voltage position point U can be used x1 ,U y1 Repeating the above X-axis direction judgment, X-axis fine scanning, Y-axis direction judgment and Y-axis fine scanning to obtain U x2 ,U y2 The default current voltage is the optimal value for the current channel.
In an alternative embodiment of the invention, the method further comprises:
detecting whether the scaling voltage meets a preset condition;
and determining the scaling voltage of the first output channel again based on the initial voltage value and the adjustable second voltage step value under the condition that the scaling voltage does not meet the preset condition.
It should be noted that, in the embodiment of the present invention, when the calibration voltage does not meet a preset condition, the insertion loss corresponding to the calibration voltage may not meet the preset condition, where the preset condition may be that, with a position of a coordinate point corresponding to the calibration voltage as a starting point, a lewy flight algorithm is adopted to collect voltages corresponding to a plurality of coordinate points, so as to respectively obtain the insertion loss corresponding to each voltage; if the insertion loss corresponding to each voltage is smaller than the insertion loss corresponding to the scaling voltage, the situation that the scaling voltage does not meet the preset condition is obtained.
Determining the scaled voltage of the first output channel based again on the initial voltage value and the adjustable second voltage step value may refer to the above description and will not be repeated here.
In practical application, the scaling voltage is the optimal point voltage obtained through rough scanning of a large voltage step value and fine scanning of an adjustable small voltage step value, the algorithm of the Lewy flight is to randomly combine the large voltage step value and the small voltage step value, collect a plurality of points through the Lewy flight, each point corresponds to a group of voltage values, the collected points are generally smaller than 20, if IL corresponding to each group of voltage values exists and is smaller than IL corresponding to the optimal point voltage value obtained through fine scanning, the fact that the voltage of the fine scanning is not the optimal value is required to be finely scanned again is explained; and if not, determining the voltage of the fine sweep as an optimal value, namely the calibration voltage. The process can be understood as a process of checking or verifying the calibration voltage, and the situation of misjudgment caused by local optimization can be avoided.
In the embodiment of the invention, the initial voltage value of the first output channel is obtained by sequentially inputting a plurality of voltages to the optical switch, and the scaling voltage of the first output channel is determined based on the initial voltage value and the adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value, so that the calibration time of the MEMS optical switch can be greatly shortened, the calibration efficiency of the MEMS optical switch is improved, the inspected part is increased, and the situation of misjudgment caused by local optimal can be avoided.
Based on the same inventive concept, fig. 5 is a schematic structural diagram of a calibration device of an optical switch according to an embodiment of the present invention, as shown in fig. 5, the device 50 includes: an obtaining unit 501 and a determining unit 502, wherein:
the obtaining unit 501 is configured to sequentially input a plurality of voltages to the optical switch, and obtain an initial voltage value of the first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel;
the determining unit 502 is configured to determine a scaling voltage of the first output channel based on the initial voltage value and an adjustable second voltage step value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
In some embodiments, the obtaining unit 501 is further configured to, after inputting a preset first voltage to the optical switch, sequentially change an input voltage input to the optical switch by using a first voltage step value, adjust a position of the MEMS mirror according to a position of the collimating lens, so that the MEMS mirror scans all outer optical fibers of the optical fiber array respectively, and fix a position of the MEMS mirror; obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens; after a preset second voltage is input to the optical switch, changing the input voltage input to the optical switch by sequentially adopting a first voltage stepping value based on the relative position relation, so that the MEMS reflecting mirrors respectively scan optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array, and the insertion loss of the first output channel after each scanning is obtained; and determining the minimum value of the insertion loss of the first output channel in the scanning process of the MEMS reflector, and taking a voltage value corresponding to the minimum value of the insertion loss as an initial voltage value.
In some embodiments, the determining unit 502 includes: obtaining a subunit and an updating subunit, wherein:
the obtaining subunit is configured to obtain the adjustable second voltage step value based on the initial voltage value and a preset second voltage step;
the updating subunit is configured to update the initial voltage value according to the adjustable second voltage step value, and obtain a scaling voltage of the first output channel.
In some embodiments, the obtaining subunit is further configured to fix an initial voltage value of the first axis in the two-dimensional coordinate system, and change an input voltage input to the optical switch by sequentially adopting a preset second voltage step value based on the initial voltage value of the second axis, so as to obtain a variation of the insertion loss of the first output channel; and adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain the adjustable second voltage stepping value.
In some embodiments, the updating subunit is further configured to update the initial voltage of the second axis based on the adjustable second voltage step value and the direction of the variation of the insertion loss, and obtain the scaled voltage of the first output channel second axis in case the direction of the variation of the insertion loss is changed.
In some embodiments, the obtaining subunit is further configured to sequentially change, according to the initial voltage of the second shaft, an input voltage input to the optical switch by using a preset second voltage step value in a positive-negative direction, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively; and determining the variation of the insertion loss of the first output channel according to the insertion losses.
In some embodiments, the apparatus further comprises: a detection unit for detecting whether the scaling voltage meets a preset condition; and determining the scaling voltage of the first output channel again based on the initial voltage value and the adjustable second voltage step value under the condition that the scaling voltage does not meet the preset condition.
The embodiment of the invention provides a calibration device of an optical switch, which is also characterized in that a plurality of voltages are sequentially input to the optical switch to obtain an initial voltage value of a first output channel, and the calibration voltage of the first output channel is determined based on the initial voltage value and an adjustable second voltage stepping value; the adjustable second voltage step value is obtained according to the insertion loss of the first output channel and the initial voltage value, so that the calibration time of the MEMS optical switch can be greatly shortened, and the calibration efficiency of the MEMS optical switch is improved. Some terms in the calibrating device of the optical switch have been explained in the calibrating method of an optical switch and are not repeated herein.
The present invention provides a computer readable medium having stored thereon a computer program which when executed by a processor performs the steps of the above method embodiments, the aforementioned storage medium comprising: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
The embodiment of the invention also provides a calibration device of the optical switch, which comprises: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is adapted to perform the steps of the above-described method embodiments stored in the memory when the computer program is run.
Fig. 6 is a schematic hardware configuration of a scaling device of an optical switch according to an embodiment of the present invention, and a scaling device 60 of the optical switch includes: at least one processor 601 and memory 602; optionally, the scaling device 60 of the optical switch may further comprise at least one communication interface 603; the various components in the scaling device 60 of the optical switch may be coupled together by a bus system 604, it being understood that the bus system 604 is used to enable connection communications between these components. The bus system 604 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 604 in fig. 6.
It is to be appreciated that the memory 602 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory 602 described in embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
The memory 602 in embodiments of the present invention is used to store various types of data to support the operation of the scaling device 60 of the optical switch. Examples of such data include: any computer program for operating on the scaling device 60 of an optical switch, such as obtaining a mileage range for determining that the tunnel lining to be detected is defective based on the first image and the second image, etc., may be contained in the memory 602 for implementing the method of an embodiment of the present invention.
The method disclosed in the above embodiment of the present invention may be applied to the processor 601 or implemented by the processor 601. The processor 601 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 601 or instructions in the form of software. The processor 601 may be a general purpose processor, a digital signal processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 601 may implement or perform the methods, steps and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium in a memory 602 and the processor 601 reads information from the memory and in combination with its hardware performs the steps of the method as described above.
In an exemplary embodiment, the scaling device 60 of the optical switch may be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLDs, programmable Logic Device), complex programmable logic devices (CPLDs, complex Programmable Logic Device), field programmable gate arrays (FPGAs, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCUs, micro Controller Unit), microprocessors (microprocessors), or other electronic components for performing the above-described methods.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.
The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
Alternatively, the above-described integrated units of the present invention may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The calibrating method of the optical switch is characterized in that the optical switch comprises an optical fiber array, a collimating lens and a MEMS reflector; the method comprises the following steps:
sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of a first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel;
fixing an initial voltage value of a first shaft under a two-dimensional coordinate system, and changing input voltage input to the optical switch by sequentially adopting a preset second voltage stepping value based on the initial voltage value of a second shaft to obtain the variation of the insertion loss of the first output channel;
adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain an adjustable second voltage stepping value;
determining a scaled voltage for the first output channel based on the initial voltage value and the adjustable second voltage step value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
2. The method of claim 1, wherein sequentially inputting the plurality of voltages to the optical switch to obtain the initial voltage value of the first output channel comprises:
after a preset first voltage is input to the optical switch, sequentially changing the input voltage input to the optical switch by adopting a first voltage stepping value, and adjusting the position of the MEMS reflector according to the position of the collimating lens so that the MEMS reflector scans all outer-layer optical fibers of the optical fiber array respectively, and fixing the position of the MEMS reflector;
obtaining the relative position relation of the optical fiber array, the collimating lens and the MEMS reflector according to the position of the MEMS reflector and the position of the collimating lens;
after a preset second voltage is input to the optical switch, changing the input voltage input to the optical switch by sequentially adopting a first voltage stepping value based on the relative position relation, so that the MEMS reflecting mirrors respectively scan optical fibers which are spiraled from the inner layer to the outer layer in the optical fiber array, and the insertion loss of the first output channel after each scanning is obtained;
and determining the minimum value of the insertion loss of the first output channel in the scanning process of the MEMS reflector, and taking a voltage value corresponding to the minimum value of the insertion loss as an initial voltage value.
3. The method of claim 1, wherein said determining a scaled voltage for said first output channel based on said initial voltage value and said adjustable second voltage step value comprises:
and updating the initial voltage value according to the adjustable second voltage stepping value to obtain the scaling voltage of the first output channel.
4. A method according to claim 3, wherein said updating said initial voltage value based on said adjustable second voltage step value to obtain a scaled voltage for a first output channel comprises:
and under the condition that the direction of the variation of the insertion loss is changed, updating the initial voltage of the second shaft based on the adjustable second voltage step value and the direction of the variation of the insertion loss, and obtaining the scaling voltage of the first output channel second shaft.
5. The method according to claim 1, wherein the changing the input voltage to the optical switch with a preset second voltage step value based on the initial voltage of the second axis to obtain the variation of the insertion loss of the first output channel includes:
changing input voltage input to the optical switch by adopting a preset second voltage stepping value in sequence in positive and negative directions according to the initial voltage of the second shaft, so as to obtain a plurality of insertion losses of the first output channel corresponding to different voltages respectively;
And determining the variation of the insertion loss of the first output channel according to the insertion losses.
6. The method according to any one of claims 1-5, further comprising:
detecting whether the scaling voltage meets a preset condition;
and determining the scaling voltage of the first output channel again based on the initial voltage value and the adjustable second voltage step value under the condition that the scaling voltage does not meet the preset condition.
7. The calibrating device of the optical switch is characterized by comprising an optical fiber array, a collimating lens and an MEMS reflector; the device comprises: an obtaining unit and a determining unit, wherein:
the obtaining unit is used for sequentially inputting a plurality of voltages to the optical switch to obtain an initial voltage value of the first output channel; the plurality of voltages are obtained based on a preset voltage and a first voltage step value; the first output channel is an output channel corresponding to any optical fiber of the optical fiber array; the initial voltage value represents a voltage value corresponding to a minimum value of insertion loss of the first output channel;
the determination unit includes: obtaining a subunit and an updating subunit, wherein:
The obtaining subunit is configured to fix an initial voltage value of a first axis under a two-dimensional coordinate system, and change an input voltage input to the optical switch by sequentially adopting a preset second voltage step value based on the initial voltage value of a second axis, so as to obtain a variation of insertion loss of the first output channel; adjusting the preset second voltage stepping value according to the initial voltage of the second shaft and the variation of the insertion loss to obtain an adjustable second voltage stepping value;
the updating subunit is used for determining a scaling voltage of the first output channel based on the initial voltage value and the adjustable second voltage step value; the adjustable second voltage step value is less than the first voltage step value; the scaling voltage is used to scale the optical power corresponding to the first output channel.
8. A scaling device for an optical switch, the scaling device comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is adapted to perform the steps of the method of any of claims 1 to 6 when the computer program is run.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by at least one processor, carries out the steps of the method according to any one of claims 1 to 6.
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CN112710454B (en) * | 2020-12-25 | 2023-04-11 | 联合微电子中心有限责任公司 | System and method for testing and calibrating optical switch in optical switch array |
CN115799098B (en) * | 2022-11-15 | 2023-10-03 | 之江实验室 | Chip calibration method and device, storage medium and electronic equipment |
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