CN100454127C - Extendible Ruman amplifier and control method thereof - Google Patents
Extendible Ruman amplifier and control method thereof Download PDFInfo
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- CN100454127C CN100454127C CNB021507139A CN02150713A CN100454127C CN 100454127 C CN100454127 C CN 100454127C CN B021507139 A CNB021507139 A CN B021507139A CN 02150713 A CN02150713 A CN 02150713A CN 100454127 C CN100454127 C CN 100454127C
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Abstract
The present invention relates to an expandable Raman amplifier. The present invention comprises a master amplifier and a subsidiary amplifier, wherein each of the main amplifier and the subsidiary amplifier comprises a pump laser providing a pump light source, a combiner and a laser control circuit; the laser control circuit is connected with a communication bus of the present invention through a communication interface; after the pump light source of the subsidiary amplifier is combined by the combiner, the pump light source is input into the main amplifier through an optical fiber interface; the pump light source together with pump light in the main amplifier passes through a combining filter and the optical fiber interface of the main amplifier and is input into a transmission optical fiber. Because the main amplifier and the subsidiary amplifier are provided with flexible jumper type optical interfaces and pluggable and allocable electrical interfaces, the main amplifier and the subsidiary amplifier can be mutually connected or disconnected physically and can be flexibly assembled in devices or disassembled from the devices. The present invention realizes Raman amplification for light signals with wide wave bands in the mode that the amplifier is used and expanded on line to make the operation band width of optical transmission devices flexibly expanded.
Description
Technical field
The present invention relates to a kind of device of realizing that light signal amplifies, relate in particular to the dense wave division multipurpose optical communication equipment of communication field, use the expansion of the raman amplifier realization optical WDM communication system transmission bandwidth of grouping, carry out device upgrade dilatation and control corresponding method thereof with facility.
Background technology
In dense wavelength division multiplexing system, for the prolongation that realizes transmission range will be used image intensifer.A kind of method of amplifying that realizes is that Raman amplifies, and is exactly with powerful pump light feed-in Transmission Fibers, because the stimulated Raman scattering effect (SRS effect) in the optical fiber, pump energy can be transferred to than in the long flashlight of its ripple, realizes the amplification of flashlight.Therefore the reach broad that Raman amplifies is suitable in the Wave division multiplexing optical transmission system.Can select suitable pumping wavelength, make the best effort scope of amplification be positioned at a plurality of operating wave strong points of wanting transmission signals.In wavelength-division multiplex system, the centre wavelength difference of each optical channel, under certain wavelength interval situation, the more bandwidth that take of optical channel quantity wide more more.Because the gain spectral unevenness of SRS effect, in order to realize that the signal in the broad wavelength region may amplifies, the effect that guarantees whole channels acquisition amplifications is identical or close, the pumping light power acting in conjunction that can use a plurality of wavelength is in the wavelength coverage of signal work, the wavelength of a plurality of pumpings of optimized choice can make the flatness of full gain spectrum in the wavelength coverage of signal work satisfy requirement of system design.Therefore, the optical channel quantity difference that will transmit under certain wavelength interval situation is also different with the pumping quantitative requirement to employed raman amplifier pumping wavelength.The document of publishing (but being not limited to) [(1) .M.-S.Kao and J.Wu, ' Signal light amplificationby stimulated Raman scattering in an N-channel WDM opticalfiber communication system, ' J.Lightwave Technology, vol.7, pp.1290-1299,1989. (2) .M.-S.Kao and J.Wu, ' Extending transmissiondistance of high-density WDM systems using post transmitter fiberRaman amplifiers, ' J.Lightwave Technology, vol.9, pp.394-399,1991. (3) P.B.Hansen, L.Eskildsen, S.G.Grubb, A.J.Stentz, T.A.Strasser, J.Judkins, J.J.Demarco, R.Pedrazzani, and D.J.DiGiovanni, ' Capacity upgrades of transmission systems by Raman amplifier, ' IEEE Photon.Technol.Lett., Vol.9, pp.262-264,1997.] to realizing the principle that wdm optical signal amplifies with pump laser or many pump lasers, implementation has been carried out deep introduction.But the document of publishing is not included in the engineering application how to assemble, control and manage the progressive expansion that a plurality of pump lasers are realized device bandwidth.For example in the dense wave division multipurpose optical transmission system that early uses, the scope of optical channel is at C-band, and promptly wavelength is near 1550nm; And new commercialization equipment can be realized the common transmission of C-band and near L-band (wavelength is 1585nm), and the development trend of optical communication equipment will make more bandwidth become the working range of optical signal transmission.Owing to the cost of raman amplifier is higher, when using in equipment, the working range of amplifier should be expanded, and the difference of promptly looking the device bandwidth range of needs is and configurable, and the pumping source that will support different-waveband to amplify separates.When system works during, only use the amplifier that this wave band is played amplification at certain wave band; And when system works during at wideer wave band, the mode by expanded configuration realizes that the signal of wideer wave band amplifies.Disclosed patent description US6292288 Ramanamplifier, optical repeater, and raman amplification method, Akasaka, et al. has announced that the principle of selecting according to certain power and wavelength realizes the method for many pump laser combinations, constitutes multi-pumping Raman amplifier.Disclosed patent description US6417959 Raman fiber amplifier has announced that the principle of selecting with US6292288 different capacity and wavelength realizes the method for many pump laser combinations, constitutes multi-pumping Raman amplifier.Announced among disclosed patent description EP1187276 Optical amplifierfor wide band raman amplification of wavelength division multiplexed (WDM) the signal lights by many pumpings driving source and realized the raman amplifier that broadband signal is amplified.In above disclosed patent description, all undeclared combination of online upgrading formula extendible Ruman amplifier, main amplifier that promptly works alone and the open-ended auxilliary amplifier how realized.
Summary of the invention
The objective of the invention is to realize the difficulty of gradual bandwidth upgrading, solve when the wavelength coverage of transmission signals enlarges in a large number, the optical channel of dilatation is realized the problem of amplifying in order to overcome the use raman amplifier.During dilatation, do not change the raman amplifier that originally was configured in the equipment, directly increase the expansion that the configuration expanding unit is realized the effective operating wavelength range of upgrading and system of raman amplifier.
Expansion raman amplifier of the present invention, comprise: main amplifier and auxilliary amplifier, described main amplifier is connected with pluggable electrical interface by flexible jumper formula optical fiber interface with described auxilliary amplifier, comprise pump laser, wave multiplexer and the laser control circuit that pump light source is provided in described main amplifier and the auxilliary amplifier, this laser control circuit links to each other with the devices communicating bus by communication interface, realizes detection and the control of equipment management system to the pump laser duty; After the pump light source of auxilliary amplifier is closed ripple by wave multiplexer, be input in the main amplifier, and the pump light in the main amplifier is input in the Transmission Fibers together by closing the optical fiber interface of wave filter and main amplifier by optical fiber interface.
Described laser control circuit comprises the minimum control module of CPU, pump laser driving circuit and laser works performance collection circuit; Be connected with control line by data line between each circuit.
Described pump laser driving circuit and laser works performance collection circuit comprise AD/DA change-over circuit and amplifier circuit.
Described auxilliary amplifier is one or more.
Described main amplifier has a plurality of optical fiber interfaces and is connected with auxilliary amplifier, comes from the pump light of a plurality of optical fiber interfaces and the pumping light power in the main amplifier and synthesizes.
The data query message, the configuration data that receive from equipment management system by the electrical interface that is connected with the devices communicating bus upgrade message, send the reporting information message by the electrical interface that is connected with the devices communicating bus to equipment management system.
Adopt device of the present invention, compared with prior art, obtained the progress of optical communication equipment dilatation way, the mode that has reached by online use expander amplifier realizes the effect that Raman amplifies to the light signal of wideer wave band, has saved the initial investment cost of equipment to be upgraded.The bandwidth of operation of optical transmission device can be expanded neatly.
Description of drawings
Fig. 1 is extendible Raman multiplying arrangement structural drawing.
Fig. 2 is the variation structure of light path connected mode between auxilliary amplifier and the main amplifier, as embodying another embodiment that conceives with Fig. 1 same design.
Fig. 3 is the basic structure block diagram of main amplifier and auxilliary amplifier control circuit.
Main components and parts label declaration:
11 main amplifiers
12,13,32,33 palarization multiplexing devices
L11, L12, L21, L22, L31, L32, L41, L42 laser instrument
31 auxilliary amplifiers
14,18,34,41 close wave filter
C1, C2, C 3, C4, C5, C6 flange plate type optical fiber interface
15,35 isolators
16 wave multiplexers
17,36 laser control circuits
B communication bus CPU microprocessor
ROM ROM (read-only memory) RAM random access memory
FPGA Programmable Logic Device I/O input/output interface
CS control signal wire AD/DA modulus/digital-to-analog conversion
J1 power connector J2 signal connector
D1, D2, D-ROM, D-RAM, D-FPGA data line
EN-FPGA, EN-PAM, EN-ROM control line
JP1, the JP2 laser interface
VC, VC1, VCC, V0, VP bias voltage
A1, A2, A3, A4 amplifier circuit
I1 laser bias current input end
I2 laser instrument refrigeration current input terminal
O1 laser instrument backlight power detection signal output terminal
The output of O2 laser tube core working temperature
Embodiment
Referring to Fig. 1, the main amplifier that is connected with a bus interface by an optical interface and the implementation of auxilliary amplifier have been provided.
As shown in Figure 1, the 11st, realize the main amplifier that Raman amplifies, in main amplifier 11, the general pump laser combination of expression in the frame of broken lines.Become example with 2 pumping wavelengths, each wavelength by 2 laser array, L11 is two laser instruments with different polarization direction, identical operation wavelength with L12 in the main amplifier 11; The 12nd, the palarization multiplexing device; L21 is two laser instruments with different polarization direction, identical operation wavelength with L22; The 13rd, the palarization multiplexing device; The 14th, close wave filter.Laser instrument L11 and laser instrument L12 output light is combined into 1 tunnel light with specific wavelength of crossed polarized light after through palarization multiplexing device 12.Laser instrument L21 and laser instrument L22 output light is combined into 1 tunnel light with another specific wavelength of crossed polarized light after through palarization multiplexing device 13.The output light of palarization multiplexing device 12 and palarization multiplexing device 13 is coupling in the same optical waveguide through after closing wave filter 14.Close the total pump light that the light of wave filter 14 output is provided for main amplifier 11.
C3 is the flange plate type optical fiber interface, makes the pump light of auxilliary amplifier 31 outputs enter main amplifier by this interface.
Wave filter or coupling mechanism are closed in 18 expressions, from auxilliary amplifier through optical fiber interface C3 enter main amplifier 11 luminous power can with merge by the luminous power of closing wave filter 14 outputs.
The 15th, the isolator that uses in the main amplifier is used for avoiding that undesirable luminous power enters the represented pump laser group of frame of broken lines in the circuit.
C1, C2 are the flange plate type optical fiber interfaces, are signal optical waveguide path in the main amplifier 11 between C1 and C2.Flashlight is connected with Transmission Fibers through optical fiber interface C1, is connected with other devices in the equipment through optical fiber interface C2.Flashlight can transmit along C1 to C2 direction, also can be along the direction transmission of C2 to C1.
The 16th, wave multiplexer is coupled to pumping light power in the signal optical waveguide path by wave multiplexer.Pump light will be sent to optical fiber interface C1 through behind the wave multiplexer 16.
The 17th, the laser control circuit in the main amplifier 11.Comprise CPU minimum operation system, pump laser driving circuit and laser works performance collection circuit, realize detection and control the pump laser duty.Laser control circuit also comprises communication interface, and the signal wire of communication interface uses electric connector to link to each other with the carrier of devices communicating bus B.
The 31st, realize the auxilliary amplifier that Raman amplifies, in auxilliary amplifier 31, the device that expression realizes according to general pump laser combined method in the frame of broken lines, still become example with 2 pumping wavelengths, each wavelength by 2 laser array, L31 is two laser instruments with different polarization direction, identical operation wavelength with L32 in the auxilliary amplifier 31; The 32nd, the palarization multiplexing device; L41 is two laser instruments with different polarization direction, identical operation wavelength with L42; The 33rd, the palarization multiplexing device; The 34th, close wave filter.Laser instrument L31 and laser instrument L32 output light is combined into 1 tunnel light with specific wavelength of crossed polarized light after through palarization multiplexing device 32.Laser instrument L41 and laser instrument L42 output light is combined into 1 tunnel light with another specific wavelength of crossed polarized light after through palarization multiplexing device 33.The output light of palarization multiplexing device 32 and palarization multiplexing device 33 is coupling in the same optical waveguide through after closing wave filter 34.The light that closes wave filter 34 outputs is for assisting the total pump light that amplifier 31 is provided.
C4 is the flange plate type optical fiber interface, and the pump light of auxilliary amplifier 31 outputs can be exported by this interface.
The 35th, the isolator that uses in the auxilliary amplifier is used for avoiding the connection of optical fiber interface C4 to C3 to cause undesirable luminous power to enter the represented pump laser group of frame of broken lines.
The 36th, the laser control circuit in the auxilliary amplifier 31.Comprise CPU minimum operation system, pump laser driving circuit and laser works performance collection circuit, realize detection and control the pump laser duty.Laser control circuit also comprises communication interface, and the signal wire of communication interface uses electric connector to link to each other with the carrier of devices communicating bus B.
B is the devices communicating bus, and communication bus is present in the physical support of equipment, links to each other with the laser control circuit communication interface of main amplifier and auxilliary amplifier respectively by electric connector.The inventive features that embodiment embodied of Fig. 1 is: main amplifier is connected with a bus interface by an optical interface with auxilliary amplifier.
As the another program that embodies with the design of Fig. 1 same design, the variation structrual description of Fig. 2 the implementation that is connected with auxilliary amplifier by the multi-channel optical fibre interface of main amplifier.
The part that Fig. 2 represents in frame of broken lines is distinguished mutually with Fig. 1, C3 wherein, and C4, C5, C6 are the flange plate type optical fiber interfaces, are illustrated in to have between main amplifier and the auxilliary amplifier more than 1 optical fiber to connect.
The 41st, have the wave filter that closes of a plurality of input ports.Realize main amplifier and the ripple that closes that comes from the auxilliary whole pump lights of amplifier that inserts by optical fiber interface C3...C5.
Attention is not used in auxilliary amplifier and is closed wave filter, but the multichannel pump light is exported through optical fiber interface C4...C6 respectively.
Notice that the design that this figure embodies is that main amplifier has a plurality of optical fiber interfaces that are used to expand, come from the pump light of a plurality of optical fiber interfaces and the pumping light power in the main amplifier and synthesize.
The meaning of the described embodiment of Fig. 2 also is, because main amplifier has a plurality of optical fiber interfaces that are used to expand, makes the spendable expanding unit can be more than 1.
The related wave filter (14,34,18,41) that closes will design suitable transport property according to connected mode and pumping wavelength in Fig. 1 and Fig. 2, can provide wave filter customized by the device supplier.For example in the embodiment of Fig. 1, for the signal of realizing C-band amplifies, the wavelength of pump laser L11 and L12 is assumed to λ 1=1421.5nm, the wavelength of pump laser L21 and L22 is assumed to λ 2=1455.0nm, then close 2 input ports that wave filter 14 can adopt λ 1 λ 2 wave multiplexers; Realize that by introducing auxilliary amplifier the signal of C+L wave band amplifies, the wavelength of pump laser L31 and L32 is assumed to λ 3=1439.0nm, the wavelength of pump laser L41 and L42 is assumed to λ 4=1495.0nm, then close wave filter 34 can adopt 2 input ports λ 3 λ 4 wave multiplexers, close the type wave multiplexer that interweaves that wave filter 18 can adopt 2 input ports, a port is imported λ 1 and λ 2, another port input λ 3 and λ 4.Again for example in the embodiment of Fig. 2, still adopt the laser instrument of above-mentioned wavelength, then close wave filter 41 can adopt 4 input ports λ 1 λ 2 λ 3 λ 4 wave multiplexers, in order to realize bigger extended capability, closing wave filter 41 can be designed as to have and more closes the ripple input port, more close the ripple input port with the more pumping wavelengths of correspondence, the extended capability of main amplifier is strengthened.
Constitute minimum control module by microprocessor CPU, read only memory ROM, random access memory RAM, Programmable Logic Device FPGA, between each circuit chip by data line (D-ROM, D-RAM, D-FPGA) and control line (EN-FPGA, EN-RAM EN-ROM) is connected; CPU is connected to J2 by data line D1 and I/O interface circuit.J2 be and device bus B between signal connector.The DC/DC change-over circuit that also comprises standard in the circuit, and the needed bias voltage of output various piece functional circuit (VC, VC1, VCC, V0, VP).The DC/DC change-over circuit is connected to J1, J1 be and device bus B between power connector, power connector J1 and signal connector J2 realize being electrically connected of amplifier and device bus jointly, realize with the form of contact pin and socket, can plug.
(A3 A4) constitutes pump laser and drives and the performance collection part for A1, A2 by AD/DA change-over circuit, amplifier circuit.JP1, JP2 represent the interface of different pump laser 1,2, and the user that the commercial lasers device is abideed by in the application of pump laser interface uses data.With JP1 is example, and I1 represents the laser bias current input end, and I2 represents laser instrument refrigeration current input terminal, and O1 represents laser instrument backlight power detection signal output terminal, and O2 represents laser tube core working temperature output terminal.
CPU communicates by letter with the AD/DA change-over circuit by data line D2.When needs were controlled the output power of pump laser 1, CPU control FPGA selected the output port of AD/DA, and sheet selected control system information exports the AD/DA change-over circuit to by control signal wire CS; CPU to AD/DA change-over circuit output data, realizes that DA changes the back by FPGA selected port output analog operation electric current and maintenance, again through delivering to the bias current input end I1 of the interface JP1 of pump laser 1 after amplifying by data line D2 simultaneously.When needs were controlled the die temperature of pump laser 1, CPU control FPGA selected the output port of AD/DA, and sheet selected control system information exports the AD/DA change-over circuit to by control signal wire CS; CPU passes through data line D2 to AD/DA change-over circuit output data simultaneously.Realize that DA changes the back by FPGA selected port output analog operation electric current and maintenance, again through delivering to the refrigeration current input terminal I2 of the interface JP1 of pump laser 1 after amplifying.When needs detect the output power of pump laser 1, CPU control FPGA selects the input port of AD/DA, the O1 end output signal of the interface JP1 of pump laser 1 is input to the AD/DA circuit after suitably amplifying, realize outputing to CPU through data line D2 after the AD conversion.When needs detect the refrigeration electric current of pump laser, CPU control FPGA selects the input port of AD/DA conversion, the O2 end output signal of the interface JP1 of pump laser 1 is input to the AD/DA circuit after suitably amplifying, realize being input to CPU through data line D2 after the AD conversion.When being controlled, pump laser need detect so that carry out more accurate feedback regulation corresponding performance.
The pump laser that detects and control when needs more for a long time, need more the detection and control circuit, link to each other with the interface of each laser instrument respectively, select proper A D/DA converter according to the number of parameters that quantity, the needs of laser instrument detect and control, realize that multichannel detects and control.
CPU will deposit the control of laser instrument and Performance Detection data in RAM, as " performance tabulation ", to make things convenient for equipment control, can inquire about through CPU by data bus B.
In ROM, need store flag information, so that recognition of devices main amplifier and auxilliary amplifier.
When realizing gain control, the distribution ratio regular meeting of the output power of each pump laser influences the flat gain in the bandwidth of signal place.Corresponding to needed working gain of system and flat gain requirement, the output power of each pump laser is as can be known, and the output power value of each pump laser is corresponding with its bias current.The bias current value of each pumping can be stored in ROM,, implement control so that CPU abides by these data as " tabulation is set ".If the storer of this storage bias current has the electric erasable function, then " tabulation is set " but online modification, and after device looses power, can lose.
CPU will inquire about default " tabulation is set " that has among the ROM after amplifier powers on, and bias current value is according to the rules implemented control to the pump laser on the main amplifier; The status information of control after finishing will deposit in " the performance tabulation " among the RAM, comprise current bias current, electric current, detection backlight, die temperature etc. freeze.
If ROM comprises the electric erasable function, all job information also can be kept among the ROM.The benefit of doing like this is that operational data is not lost after the power down.
Among the embodiment mentioned above,, make it can to interconnect or separate physically because main amplifier and auxilliary amplifier have flexible jumper formula optical interface and pluggable electrical interface, and load facility or separate equipment neatly.
Be the control of realization amplifier, require and the flat gain requirement, the invention provides a kind of method that expander amplifier is upgraded and controlled to satisfy gain.
At first equipment management system can be implemented following inquiry by device bus B pair amplifier device:
Attribute information inquiry (corresponding message 1)
Performance information inquiry (corresponding message 2)
Configuration information inquiry (corresponding message 3)
Amplifier can be exported following message to device bus B by the I/O interface:
Attribute information reports (corresponding message 4)
Performance information reports (corresponding message 5)
Configuration information reports (corresponding message 6)
Equipment management system can be implemented following control by device bus B pair amplifier device:
Configuration data upgrades (corresponding message 7)
Provide the embodiment of above-mentioned message 1-7 below respectively:
Message 1:[H, A, C1, L, P]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C1 is a protocol code, this device of expression inquiry here property value; L represents message length.
Message 2:[H, A, C2, L, F]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C2 is a protocol code, here represents this device is implemented performance queries; L represents message length; F represents the performance number classification to the inquiry of this device, comprises current bias current, refrigeration electric current, detection backlight, die temperature etc.
Message 3:[H, A, C3, L, C]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C3 is a protocol code, here represents this device is implemented the configuration information inquiry; L represents message length; C represents the performance number classification to this device inquiry, comprises the bias current, refrigeration electric current of configuration etc.
Be the inquiry of back message using 1, amplifier also will be exported the message of following form by the I/O interface to device bus B:
Message 4:[H, A, C4, L, P]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C4 is a protocol code, and expression here reports this device property value; L represents message length; P represents the attribute of this device, is used to distinguish the type of amplifier.
Be the inquiry of back message using 2, amplifier also will be exported the message of following form by the I/O interface to device bus B:
Message 5:[H, A, C5, L, F, V1, V2 ..., Vn]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C5 is a protocol code, represents that here this device performance value reports; L represents message length; F represents the performance number classification to the inquiry of this device, comprises current bias current, refrigeration electric current, detection backlight, die temperature etc.; V1, V2 ..., Vn represents n performance number reporting.
Be the inquiry of back message using 3, amplifier also will be exported the message of following form by the I/O interface to device bus B:
Message 6:[H, A, C6, L, C, V1, V2 ..., Vn]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C6 is a protocol code, represents that here this device configuration information reports; L represents message length; C represents the configuration information classification to this device inquiry, comprises the bias current, refrigeration electric current of configuration etc.; V1, V2 ..., Vn represents n configuration information value reporting.
When equipment management system pair amplifier device is implemented the configuration data renewal, send the message of following form by device bus B pair amplifier
Message 7:[H, A, C7, L, C, V1, V2 ..., Vn]
Wherein H represents heading, is in order to realize the set form train of impulses of communication synchronization; A represents the address mark of this device in equipment; C7 is a protocol code, here represents this device is configured Data Update; L represents message length; The configuration information classification that C indicates to upgrade comprises bias current, the refrigeration electric current etc. of configuration; V1, V2 ..., Vn represents n configuration information value reporting.
Equipment management system sends dissimilar data query messages by the devices communicating bus to extendible Ruman amplifier; Or extendible Ruman amplifier initiatively reports the message that shows attribute by the devices communicating bus to equipment management system.
When having only main amplifier in the equipment, amplifier can initiatively report message 4 or inquiry reports message 4 through message 1, is used for pair amplifier to discern; System uses message 2 and message 3 can be configured, performance queries, can give tacit consent to the amplifier init state, also can implement configuration data by message 7 and upgrade.Amplifier will be implemented new power control to pump laser according to new Configuration Values after receiving message 7.
Equipment is realized the bandwidth of operation upgrading by inserting auxilliary amplifier.The problem of having brought change in gain and flatness to change during bandwidth upgrading.
When equipment inserted auxilliary amplifier, auxilliary amplifier can initiatively report message 4 or 1 inquiry reports message 4 through message, was used for pair amplifier to discern; The pumping light power of auxilliary amplifier will change gain spectral, so online gain and flat gain in order to realize optimizing, need readjust the pumping output power of main amplifier.This moment system use the message 2 contain different addresses and message 3 can be respectively to main amplifier and auxilliary amplifier be configured, performance queries, can give tacit consent to main amplifier and auxilliary amplifier init state, also can implement the configuration data renewal to main amplifier and auxilliary amplifier respectively by message 7.Main amplifier and auxilliary amplifier will be implemented new power control to pump laser according to new Configuration Values after receiving message 7 respectively.Microprocessor in the amplifier and laser control circuit can make it the optical power value output according to expectation according to new configuration data control laser instrument.Issuing the message of main amplifier and auxilliary amplifier will distinguish mutually according to the address that comprises in the message.
Claims (7)
1, a kind of extendible Ruman amplifier, it is characterized in that comprising: main amplifier and auxilliary amplifier, described main amplifier is connected with pluggable electrical interface by flexible jumper formula optical fiber interface with described auxilliary amplifier, comprise pump laser, wave multiplexer and the laser control circuit that pump light source is provided in described main amplifier and the auxilliary amplifier, this laser control circuit links to each other with the devices communicating bus by communication interface, realizes detection and the control of equipment management system to the pump laser duty; After the pump light source of auxilliary amplifier is closed ripple by wave multiplexer, be input in the main amplifier, and the pump light in the main amplifier is input in the Transmission Fibers together by closing the optical fiber interface of wave filter and main amplifier by optical fiber interface.
2, extendible Ruman amplifier as claimed in claim 1 is characterized in that: described laser control circuit comprises the minimum control module of CPU, pump laser driving circuit and laser works performance collection circuit; Be connected with control line by data line between each circuit.
3, extendible Ruman amplifier as claimed in claim 2 is characterized in that: described pump laser driving circuit and laser works performance collection circuit comprise AD/DA change-over circuit and amplifier circuit.
4, extendible Ruman amplifier as claimed in claim 1 is characterized in that: described auxilliary amplifier can be one or more.
5, extendible Ruman amplifier as claimed in claim 1 is characterized in that: described main amplifier has a plurality of optical fiber interfaces and is connected with auxilliary amplifier, comes from the pump light of a plurality of optical fiber interfaces and the pumping light power in the main amplifier and synthesizes.
6, extendible Ruman amplifier as claimed in claim 1 is characterized in that: the described wave filter that closes is designed to have a plurality of ripple input ports that close, and a plurality of corresponding a plurality of pumping wavelengths of ripple input port that close strengthen the extended capability of main amplifier.
7, extendible Ruman amplifier as claimed in claim 1, it is characterized in that: the data query message, the configuration data that receive from equipment management system by the electrical interface that is connected with the devices communicating bus upgrade message, send the reporting information message by the electrical interface that is connected with the devices communicating bus to equipment management system.
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2002
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| US5920423A (en) * | 1997-12-05 | 1999-07-06 | Sdl, Inc. | Multiple pumped fiber amplifiers for WDM communication systems with adjustment for the amplifier signal gain bandwidth |
| JP2000098433A (en) * | 1998-07-23 | 2000-04-07 | Furukawa Electric Co Ltd:The | Raman amplifier and optical relay using the same |
| CN1350653A (en) * | 1998-09-16 | 2002-05-22 | 约尔特有限公司 | Wireless optical communications withou electronics |
| US6430201B1 (en) * | 1999-12-21 | 2002-08-06 | Sycamore Networks, Inc. | Method and apparatus for transporting gigabit ethernet and fiber channel signals in wavelength-division multiplexed systems |
| CN1336735A (en) * | 2000-07-25 | 2002-02-20 | 住友电气工业株式会社 | Raman amplifier component, and optical transmission system using same |
| JP2002076482A (en) * | 2000-08-31 | 2002-03-15 | Fujitsu Ltd | Optical amplifier, optical amplification method and optical amplification system |
| EP1229616A2 (en) * | 2001-02-05 | 2002-08-07 | The Furukawa Electric Co., Ltd. | Raman amplifier system, apparatus and method for identifying, obtaining and maintaining an arbitrary raman amplification performance |
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| CN1503044A (en) | 2004-06-09 |
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