CN109449739B - Laser pumping source system with low electric loss - Google Patents
Laser pumping source system with low electric loss Download PDFInfo
- Publication number
- CN109449739B CN109449739B CN201811598671.7A CN201811598671A CN109449739B CN 109449739 B CN109449739 B CN 109449739B CN 201811598671 A CN201811598671 A CN 201811598671A CN 109449739 B CN109449739 B CN 109449739B
- Authority
- CN
- China
- Prior art keywords
- resistor
- module
- operational amplifier
- port
- inverting input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a low-electric-loss laser pumping source system, which belongs to the technical field of electronic equipment and structurally comprises a laser module (1), a power control module (2) and a temperature control module (3); the main structure of the power control module (2) comprises a load judgment module (206), a delay compensation module (207), a voltage tracking module (208), a power-off protection module (211) and the like. When the power supply works at different output powers, the lowest electric loss can be kept, and the overall efficiency of the system is improved.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to a low-electric-loss laser pumping source system.
Background
The fiber laser has the advantages of low threshold value, high power, high beam quality, good reliability, compact structure, good heat dissipation and the like, and is widely applied to the fields of laser fiber communication, laser space long-distance communication, industrial shipbuilding, automobile manufacturing, laser engraving, laser marking, laser cutting, printing and roll manufacturing, metal and nonmetal drilling/cutting/welding (brazing, quenching, cladding and deep welding), military and national defense safety, medical instruments and equipment and the like. The fiber laser is a laser using a rare earth element doped fiber as a gain medium. The fiber laser is developed on the basis of a fiber amplifier and consists of three basic elements, namely a pumping source, a rare earth element doped fiber and a resonant cavity, and the working principle is as follows: photons on the pumping wavelength generated by the pumping source are absorbed by the doped optical fiber, so that rare earth element ions in the doped optical fiber transition to a higher energy level to form population inversion; under the spontaneous or excited condition, the rare earth element ions return to a low energy level from a high energy level and simultaneously release photons with corresponding energy; the above process constitutes positive feedback in the fiber cavity of the fiber laser, thereby forming a laser oscillation output.
The laser pumping source is the core part of the fiber laser and provides an energy source for the whole fiber laser, and the common pumping source generally consists of a butterfly laser module, a current driver and a temperature controller. Technical indexes of the pumping source affect technical indexes of the whole optical fiber laser, so that the requirement on the technical indexes of the laser pumping source is high, stability and efficiency are more important in all technical indexes of the laser pumping source, and the stability and efficiency of the laser pumping source are required to be as high as possible to ensure high stability and efficiency of the whole optical fiber laser system. The closest prior art of the invention is the invention patent with the title of 2016, 9 and 5, application number 2016108010570, which is applied for 'a high-stability laser pump source with overtemperature protection function', wherein a butterfly laser module is used as a luminous source, and is driven and controlled by a power control module and a temperature control module with high stability, and a PID operation circuit is added in the power control module, so that the stability of output laser is effectively improved.
The above patent has certain disadvantages, the most important of which is low efficiency, and the main reason for the low efficiency is that the electric loss in the system is too high. The core structure of patent 2016108010570 includes a laser module (butterfly laser module), a power control module and a temperature control module, the structure of the power control module is shown in figure 2 of the patent, the structure of the power control module comprises a power sampling module, a PID operation module, an LD driving module and the like, the core part of the power control module is the LD driving module, the power control module is responsible for generating constant current with high stability and outputting the constant current to the butterfly laser, the circuit schematic diagram is shown in fig. 7 of the patent, in which a current loop is formed from a fixed voltage VCC to ground via a power tube Q1, a sampling resistor Rs1, an LD + (laser diode anode), an LD- (laser diode cathode, not shown in the figure), the current in the loop has extremely high stability due to the action of depth negative feedback and the action of the front stage PID control, and the magnitude of the current is controlled by the front stage control circuit. In the loop, the sum of the voltage drop borne by the power tube Q1, the voltage drop borne by the sampling resistor Rs1 and the voltage drop borne by the laser diode is equal to the power supply voltage VCC (fixed value), when the set driving current is reduced from large to small, the voltage across the laser diode and the voltage across the sampling resistor Rs1 are correspondingly reduced, and the power tube Q1 is a non-linear device, and actively bears redundant voltage to keep the sum of the voltages of the three equal to VCC, so that the electric power generated by the circuit is more changed into the tube loss of the power tube Q1, that is, the power output by the power control module is reduced along with the reduction of the set driving current, but the electric loss of the power control module is increased, which on one hand causes the overall efficiency of the system to be rapidly reduced, and on the other hand, the generated heat is increased along with the increase of the tube loss of the power tube Q1, the temperature of the system will rise, with more serious consequences: the stability of the output current is reduced and the risk of burning out the power tube is brought.
In addition, patent 2016108010570 does not have the function of overcurrent protection, and once a control unit fails, the current value output to the butterfly laser module exceeds the maximum safe current value that the butterfly laser can bear, the butterfly laser is easily burned out.
Therefore, further improvements are needed in the existing laser pumping sources.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the background technology and provide a low-electric-loss laser pumping source system, which can automatically adjust the parameters of a power control circuit when the set driving current changes, always keep lower electric loss and higher efficiency and has the function of overcurrent power-off protection.
The technical problem of the invention is solved by the following technical scheme:
a low-electric-loss laser pumping source system structurally comprises a laser module 1, a power control module 2 and a temperature control module 3, wherein the power control module 2 structurally comprises a power setting module 201, a power sampling module 202, a PID operation module 203, a soft start module 204 and an LD driving module 205, and is characterized in that the power control module 2 structurally comprises a load judgment module 206, a delay compensation module 207, a voltage tracking module 208, an overcurrent judgment module 209, an overtemperature judgment module 210 and a power-off protection module 211;
the structure of the LD driving module 205 is: one end of a switch of the relay EK1 is used as a first input end of the LD driving module 205 and is denoted as a port PWR-in1, the other end of the switch of the relay EK1 is connected to a drain of the fet Q1 and is used as a first output end of the LD driving module 205 and is denoted as a port PWR-out1, one end of a coil of the relay EK1 is connected to the power supply Vdd, the other end is used as a second input end of the LD driving module 205 and is denoted as a port PWR-in2, a gate of the fet Q1 is connected to an output end of the operational amplifier U1A, a source is used as a second output end of the LD driving module 205 and is denoted as a port PWR-out2, one end of the resistor R1 is connected to a non-inverting input end of the operational amplifier U1A and is used as a third input end of the LD driving module 205 and is denoted as a port PWR-in3, the other end of the resistor R1 is used as a fourth input end of the LD driving module 205 and is denoted as a port PWR-in4, an inverting, the other end of the capacitor C1 is connected to the output end of the operational amplifier U1A, the other end of the resistor R2 is connected to one end of the sliding resistor W1, the sliding terminal of the sliding resistor W1 and the output end of the operational amplifier U1B, the other end of the sliding resistor W1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the inverting input end of the operational amplifier U1B and one end of the resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1B is connected to one end of the resistor Rs, and serves as the third output end of the LD driving module 205, which is called a port PWR-out3, and the other end of the resistor;
the load determination module 206 has the following structure: a non-inverting input terminal of the operational amplifier U2A, which is referred to as a port Vjdg-in1, is connected to a port PWR-out1 of the LD driver module 205, an inverting input terminal of the operational amplifier U2A is connected to an output terminal of the operational amplifier U2A and one end of a resistor R5, the other end of the resistor R5 is connected to one end of a resistor R6 and a non-inverting input terminal of the operational amplifier U3A, the other end of the resistor R6 is grounded, an output terminal of the operational amplifier U3A is connected to one end of a resistor R8 and one end of a resistor R9, the other end of the resistor R8 is connected to an inverting input terminal of the operational amplifier U3A and one end of a resistor R7, the other end of the resistor R7 is connected to an inverting input terminal of the operational amplifier U2B and an output terminal of the operational amplifier U2B, a non-inverting input terminal of the operational amplifier U2B is referred to a second input terminal of the load determination module 206, which is referred to a port Vjdg-in2, and the non-inverting input terminal of the operational amplifier U36867 and the resistor R368658, the other end of the resistor R10 is connected to the power supply Vcc/2, the output end of the operational amplifier U3B is connected to one end of the resistor R12, and serves as the output end of the load determining module 206, which is denoted as the port Vjdg-out, and is connected to the input end of the delay compensation module 207, the other end of the resistor R12 is connected to the inverting input end of the operational amplifier U3B and one end of the resistor R11, the other end of the resistor R11 is connected to the output end of the operational amplifier U4B and the inverting input end of the operational amplifier U4B, the non-inverting input end of the operational amplifier U4B is connected to the sliding terminal of the sliding rheostat W2, one end of the sliding rheostat W2 is grounded, and the other end serves as the third input end of the load determining module 206, which is denoted as the port Vjdg-in3, and is;
the delay compensation module 207 has the following structure: one end of the resistor R13 is connected to one end of the resistor R18, and serves as an input end of the delay compensation module 207, which is denoted as a port Vdly-in, and is connected to the port Vjdg-out of the load determination module 206, the other end of the resistor R13 is connected to the inverting input end of the operational amplifier U4A and one end of the resistor R15, the non-inverting input end of the operational amplifier U4A is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the power supply Vcc/2, the other end of the resistor R15 is connected to the output end of the operational amplifier U4A and one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R17, one end of the resistor R21 and the inverting input end of the operational amplifier U5A, the other end of the resistor R17 is connected to the output end of the operational amplifier U5A, which serves as an output end of the delay compensation module 207, which is denoted as a port Vdly-out, and is connected to a second input end of the voltage, the other end of the resistor R22 is connected with a power supply Vcc/2, the other end of the resistor R21 is connected with one end of a resistor R20, one end of a capacitor C2 and the output end of the operational amplifier U5B, the other end of the resistor R20 is connected with the other end of a capacitor C2, the inverting input end of the operational amplifier U5B and the other end of the resistor R18, one end of the resistor R19 is connected with the non-inverting input end of the operational amplifier U5B, and the other end of the resistor R19 is connected with the power supply Vcc;
the structure of the voltage tracking module 208 is that one end of a resistor R23 is connected with a power supply Vcc/2, the other end of the resistor R23 is connected with the reverse input end of an operational amplifier U6A, the non-inverting input end of the operational amplifier U6A is connected with one end of a resistor R24 and one end of a resistor R25, the other end of the resistor R24 is connected with the output end of an operational amplifier U6A, the other end of a resistor R25 is connected with the output end of an operational amplifier U6B, one end of a resistor R26 is connected with the output end of an operational amplifier U6A, and the other end of the resistor R26 is connected with the reverse; one end of the resistor R27 is connected with the equidirectional input end of the operational amplifier U6B, and the other end is connected with a power supply Vcc/2; one end of a capacitor C3 and one end of a resistor R28 are connected with the reverse input end of the operational amplifier U6B, the other end of the capacitor C3 is connected with the output end of the operational amplifier U6B, the output end of the operational amplifier U6B is connected with one end of a resistor R29, the other end of the resistor R29 is connected with the non-inverting input end of the operational amplifier U7A, and the non-inverting input end of the resistor R29 is used as the first input end of the voltage tracking module 208, is recorded as a port Vflw-in1, and is connected with the second output end; one end of the resistor R30 is connected with the equidirectional input end of the operational amplifier U7A, and the other end of the resistor R30 is used as a second input end of the voltage tracking module 208, is marked as a port Vwlw-in 2, and is connected with a port Vdly-out of the delay compensation module 207; one end of the resistor R31 is connected with the reverse input end of the operational amplifier U7A, and the other end is connected with a power supply Vcc/2; the output end of the operational amplifier U7A is connected with the gate of a field effect transistor Q2, the drain of a field effect transistor Q2 is connected with a power supply Vcc, the source is connected with one end of an inductor L1 and the cathode of a diode D1, the anode of a diode D1 is grounded, the other end of the inductor L1 is connected with the anode of an electrolytic capacitor C4, the anode of the electrolytic capacitor C5, one end of a capacitor C6 and one end of a capacitor C7, and is used as the output end of the voltage tracking module 208, recorded as a port Vflw-out and connected with a port PWR-in1 of the LD driving module 205; the negative electrode of the electrolytic capacitor C4, the negative electrode of the electrolytic capacitor C5, the other end of the capacitor C6 and the other end of the capacitor C7 are all grounded;
the structure of the over-current determining module 209 is that the equidirectional input end of the operational amplifier U9A is used as the input end of the over-current determining module 209, is marked as a port OC-in, and is connected with the port PWR-out3 of the LD driving module 205; one end of the resistor R35 is connected with the reverse input end of the operational amplifier U9A, and the other end is grounded; one end of the resistor R36 is connected with the reverse input end of the operational amplifier U9A, and the other end is connected with one end of the slide rheostat W3; the other end and the slide wire end of the slide rheostat W3 are connected with the output end of the operational amplifier U9A and the equidirectional input end of the operational amplifier U9B; one end of the slide rheostat W4 is connected with a power supply Vdd, the other end of the slide rheostat W4 is grounded, and a slide wire end is connected with the reverse input end of the operational amplifier U9B; the output end of the operational amplifier U9B is used as the output end of the overcurrent judging module 209, is recorded as a port OC-out, and is connected with one input end of the power-off protection module;
the structure of the over-temperature judging module 210 is that the cathode of the zener diode D2 is connected to the power Vdd, the anode is connected to the non-inverting input terminal of the operational amplifier U10B, the inverting input terminal of the operational amplifier U10B is connected to one end of the capacitor C9, one end of the resistor R38 and the emitter of the diode Q4, the other end of the resistor R38 is connected to the power Vdd, the other end of the capacitor C9 is connected to the output terminal of the operational amplifier U10B and one end of the resistor R39, the other end of the resistor R39 is connected to the base of the triode Q4, the collector of the triode Q4 is connected to the inverting input terminal of the operational amplifier U10A, and serves as one input terminal of the over-temperature judging module 210, which is marked as a port NTC1, and is; one end of the resistor R37 is connected with the non-inverting input end of the operational amplifier U10B, and the other end is grounded, and is used as the other input end of the over-temperature judging module 210, which is marked as a port NTC2 and connected with a port NTC-of the laser module 1; one end of the slide rheostat W5 is connected with a power supply Vdd, the other end of the slide rheostat W5 is grounded, and a slide wire end is connected with the equidirectional input end of the operational amplifier U10A; the output end of the operational amplifier U10A is used as the output end of the over-temperature judgment module 210, is marked as OT-out, and is connected with the other input end of the power-off protection module 211;
the power-off protection module 211 has a structure that two input ends of a nand gate U8A are respectively used as two input ends of the power-off protection module 211 and are marked as a port BRK-in1 and a port BRK-in2, and are respectively connected with an output end of the overcurrent judging module 209 and an output end of the over-temperature judging module 210, an output end of the nand gate U8A is connected with one input end of a nand gate U8B, the other input end of the nand gate U8B is connected with an output end of a nand gate U8C, an output end of the nand gate U8B is connected with one input end of a nand gate U8C and a gate of a field effect tube Q3, the other input end of the nand gate U8C is connected with one end of a capacitor C8 and one end of a resistor R33, the other end of the resistor R33 is connected with one end of a switch K1 and one end of a resistor R32, the other end of the; the source of the fet Q3 is grounded, one end of the resistor R34 is used as a first output terminal of the power-down protection module 211, which is denoted as a port BRK-out1, and is connected to the port PWR-in2 of the LD driving module 205, the other end of the resistor R34 is connected to the drain of the fet Q3, which is used as a second output terminal of the power-down protection module 211, which is denoted as a port BRK-out2, and the port BRK-out2 is simultaneously connected to the port PWR-in3 of the LD driving module 205 and the port Vflw-in1 of the voltage tracking module 208.
In the present invention, the power supply Vcc, power supply Vcc/2 and power supply Vdd are preferably 48V, 24V and 5V DC regulated power supplies, respectively.
The delay compensation module 207 of the present invention preferably has circuit parameters: the resistors R13 and R14 are 4K, R15 is 40K, R16 and R21 are 20K, R17 and R20 are 10K, R18 and R19 are 1K, R22 is 5.1K, and the capacitor C2 is 5 PF.
The laser module 1 of the present invention is preferably a strapdown LC96 butterfly packaged laser module.
Other modules of the present invention are prior art and can be designed with reference to the relevant contents of patent 2016108010570 (a high stability laser pump source with over temperature protection).
Has the advantages that:
1. the power control module utilizes the cooperative work of the load judgment module, the delay compensation module and the voltage tracking module to realize the self-adaption of the power control module to the working state of the load, and can always keep the electric loss to be minimum when the working state of the load is changed due to the change of the driving current, thereby realizing the maximization of the system efficiency.
2. When the load judgment module is designed, the invention adopts a special nondestructive testing technology to realize effective judgment of the working state of the load on the premise of not influencing the output current of the LD driving module.
3. The laser power supply system has the over-temperature and over-current power-off protection functions, and through double monitoring of the output current and the working temperature of the laser, when the output current exceeds a preset safety value or the working temperature of the laser exceeds the safety temperature, a power supply loop of the LD driving module is quickly cut off, and meanwhile, control signals of the LD driving module and the voltage tracking module are all locked to 0, so that multi-directional protection of the system is realized, and the safety of the system is greatly improved.
4. The power-off protection adopts a one-way trigger mechanism, once the power-off protection is triggered, the current can be normally output only by manual reset after the fault is eliminated, so that the power-off protection module is prevented from repeatedly acting near a safety value, and the safety of the system is further improved.
Description of the drawings:
fig. 1 is a block diagram of the overall structure of the present invention.
Fig. 2 is a block diagram of the power control module 2.
Fig. 3 is a schematic circuit diagram of the LD driving module 205.
Fig. 4 is a schematic circuit diagram of the load determination module 206.
Fig. 5 is a schematic circuit diagram of the delay compensation module 207.
Fig. 6 is a schematic circuit diagram of the voltage tracking module 208.
Fig. 7 is a schematic circuit diagram of the overcurrent determination module 209.
Fig. 8 is a schematic circuit diagram of the over-temperature determination module 210.
Fig. 9 is a schematic circuit diagram of the power down protection module 211.
Fig. 10 is a schematic diagram of a package and leads of a laser module 1 used in the present invention.
Detailed Description
The detailed structure and operation principle of each circuit of the present invention will be described with reference to the accompanying drawings. The parameters indicated in the figures are preferred circuit parameters for the various embodiments.
EXAMPLE 1 Overall System Structure
As shown in fig. 1, the system structure includes a laser module 1, a power control module 2 and a temperature control module 3, the power control module 2 and the temperature control module 3 are both connected to the laser module 1, the power control module 2 provides a driving current to the laser module 1, and the temperature control module 3 is responsible for controlling the working temperature of the laser module to make it work in a constant temperature state.
The structure of the power control module 2 is shown in fig. 2, and includes a power setting module 201, a power sampling module 202, a PID operation module 203, a soft start module 204, an LD driving module 205, a load judgment module 206, a delay compensation module 207, a voltage tracking module 208, an overcurrent judgment module 209, an over-temperature judgment module 210, and a power-off protection module 211. The required power is set by the power setting module 201, the power sampling module 202 samples the output light power through a Photodiode (PD) integrated in the laser module 1 and converts the output light power into a voltage, then the difference between the output light power and the voltage set by the power setting module 201 is obtained in the PID operation module 203 and PID operation is performed, the operation result is output to the LD driving module 205 and controls the driving current output to the laser module 1, and further the output light power of the laser module 1 is controlled, due to the automatic control function of the PID operation module, the output light power can be accurately, rapidly and stably changed according to the power set by the power setting module 201, the soft start module 204 controls the LD driving module 205 to enable the driving current output to the laser module 1 to smoothly rise from 0 to a set value, so as to reduce the power-on impact on the laser module. The load determining module 206 detects the drain-source voltage of the power transistor Q1 in the LD driving module 205 to determine the working state of the load, and controls the voltage tracking module 208 to perform adaptive adjustment after performing delay compensation by the delay compensation module 207, so that the load is in an optimal state. The overcurrent judgment module 209 monitors whether the output current of the LD driving module exceeds a safety value, and the overtemperature judgment module 210 monitors whether the core temperature of the laser module 1 exceeds a safety value, and if one of the core temperature and the core temperature exceeds the safety value, the overcurrent judgment module triggers the power-off protection module to execute the power-off operation.
The structure of the LD driving module 205 according to the present invention is shown in fig. 3: one end of a switch of the relay EK1 is used as a first input end of the LD driving module 205 and is denoted as a port PWR-in1, the other end of the switch of the relay EK1 is connected to a drain of the fet Q1 and is used as a first output end of the LD driving module 205 and is denoted as a port PWR-out1, one end of a coil of the relay EK1 is connected to the power supply Vdd, the other end is used as a second input end of the LD driving module 205 and is denoted as a port PWR-in2, a gate of the fet Q1 is connected to an output end of the operational amplifier U1A, a source is used as a second output end of the LD driving module 205 and is denoted as a port PWR-out2, one end of the resistor R1 is connected to a non-inverting input end of the operational amplifier U1A and is used as a third input end of the LD driving module 205 and is denoted as a port PWR-in3, the other end of the resistor R1 is used as a fourth input end of the LD driving module 205 and is denoted as a port PWR-in4, an inverting, the other end of the capacitor C1 is connected to the output end of the operational amplifier U1A, the other end of the resistor R2 is connected to one end of the sliding resistor W1, the sliding terminal of the sliding resistor W1 and the output end of the operational amplifier U1B, the other end of the sliding resistor W1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the inverting input end of the operational amplifier U1B and one end of the resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1B is connected to one end of the resistor Rs, and serves as the third output end of the LD driving module 205, which is called a port PWR-out3, and the other end of the resistor.
The LD driving module 205 converts the voltage into a corresponding output current under the control of the voltage output by the PID operation module 203, and outputs the output current to the laser module 1 through the port PWR-out2 (connected to the port LD + of the laser module 1) and the port PWR-out3 (connected to the port LD-of the laser module 1) of the LD driving module 205, so as to provide the required driving current for the laser module 1.
The structure of the load determining module 206 according to the present invention is shown in fig. 4: a non-inverting input terminal of the operational amplifier U2A, which is referred to as a port Vjdg-in1, is connected to a port PWR-out1 of the LD driver module 205, an inverting input terminal of the operational amplifier U2A is connected to an output terminal of the operational amplifier U2A and one end of a resistor R5, the other end of the resistor R5 is connected to one end of a resistor R6 and a non-inverting input terminal of the operational amplifier U3A, the other end of the resistor R6 is grounded, an output terminal of the operational amplifier U3A is connected to one end of a resistor R8 and one end of a resistor R9, the other end of the resistor R8 is connected to an inverting input terminal of the operational amplifier U3A and one end of a resistor R7, the other end of the resistor R7 is connected to an inverting input terminal of the operational amplifier U2B and an output terminal of the operational amplifier U2B, a non-inverting input terminal of the operational amplifier U2B is referred to a second input terminal of the load determination module 206, which is referred to a port Vjdg-in2, and the non-inverting input terminal of the operational amplifier U36867 and the resistor R368658, the other end of the resistor R10 is connected to the power supply Vcc/2, the output terminal of the operational amplifier U3B is connected to one end of the resistor R12, and serves as the output terminal of the load determining module 206, which is denoted as the port Vjdg-out, and is connected to the input terminal of the delay compensation module 207, the other end of the resistor R12 is connected to the inverting input terminal of the operational amplifier U3B and one end of the resistor R11, the other end of the resistor R11 is connected to the output terminal of the operational amplifier U4B and the inverting input terminal of the operational amplifier U4B, the non-inverting input terminal of the operational amplifier U4B is connected to the sliding terminal of the sliding rheostat W2, one end of the sliding rheostat W2 is grounded, and the other end serves as the third input terminal of the load determining module 206, which is denoted as the port Vjdg-in3, and is.
When the output power of the present apparatus changes (i.e. the driving current output by the LD driving module 205 changes), the voltage across the LD (laser diode) in the laser module 1 changes, and the field effect transistor in the LD driving module 205 adjusts the voltage shared by itself due to its nonlinear characteristics, so the load determining module 206 detects the voltage change across the field effect transistor Q1 (i.e. the ports PWR-out1 and PWR-out2 in the LD driving module 205) through the ports Vjdg-in1 and Vjdg-in2 to determine the change of the load operating state: when the driving current is increased, the voltage at two ends of the LD is increased, and the voltage at two ends of the Q1 is decreased; when the driving current is reduced, the voltage across the LD is reduced, and the voltage across the Q1 is increased. Since the Q1 and the LD are in the same output loop, small changes of the current flowing through the Q1 affect the stability of the current output to the LD, and therefore the current flowing through the Q1 is required to be affected as little as possible when the voltage at two ends of the Q1 is detected. The detected voltage across Q1 is compared with the reference voltage at port Vjdg-in3 (which is the same as the control voltage of LD driver module 205) for difference, and the difference determines the amount of voltage to be adjusted by the subsequent voltage tracking module.
Because the inductance and capacitance network in the voltage tracking module 208 at the later stage has a delay effect, a certain delay inevitably occurs when the load judgment module 206 detects the change of the load working state and finally the voltage tracking module 208 performs adaptive adjustment, so the invention adopts a delay compensation design, eliminates the delay through the delay compensation module 207, and ensures that the voltage adaptive adjustment of the voltage tracking module 208 and the detection of the load judgment module 206 are completely in synchronous operation, thereby realizing accurate and effective control.
The structure of the delay compensation module 207 is shown in fig. 5: one end of the resistor R13 is connected to one end of the resistor R18, and serves as an input end of the delay compensation module 207, which is denoted as a port Vdly-in, and is connected to the port Vjdg-out of the load determination module 206, the other end of the resistor R13 is connected to the inverting input end of the operational amplifier U4A and one end of the resistor R15, the non-inverting input end of the operational amplifier U4A is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the power supply Vcc/2, the other end of the resistor R15 is connected to the output end of the operational amplifier U4A and one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R17, one end of the resistor R21 and the inverting input end of the operational amplifier U5A, the other end of the resistor R17 is connected to the output end of the operational amplifier U5A, which serves as an output end of the delay compensation module 207, which is denoted as a port Vdly-out, and is connected to a second input end of the voltage, the other end of the resistor R22 is connected with a power supply Vcc/2, the other end of the resistor R21 is connected with one end of a resistor R20, one end of a capacitor C2 and the output end of the operational amplifier U5B, the other end of the resistor R20 is connected with the other end of a capacitor C2, the inverting input end of the operational amplifier U5B and the other end of the resistor R18, one end of the resistor R19 is connected with the non-inverting input end of the operational amplifier U5B, and the other end of the resistor R19 is connected with the power supply Vcc.
EXAMPLE 5 Voltage tracking Module of the invention
The structure of the voltage tracking module 208 is shown in fig. 6, wherein one end of a resistor R23 is connected to a power Vcc/2, the other end of the resistor R23 is connected to the reverse input end of an operational amplifier U6A, the non-inverting input end of the operational amplifier U6A is connected to one end of a resistor R24 and one end of a resistor R25, the other end of the resistor R24 is connected to the output end of an operational amplifier U6A, the other end of a resistor R25 is connected to the output end of an operational amplifier U6B, one end of a resistor R26 is connected to the output end of an operational amplifier U6A, and the other end of the resistor R24 is connected to the reverse input; one end of the resistor R27 is connected with the equidirectional input end of the operational amplifier U6B, and the other end is connected with a power supply Vcc/2; one end of a capacitor C3 and one end of a resistor R28 are connected with the reverse input end of the operational amplifier U6B, the other end of the capacitor C3 is connected with the output end of the operational amplifier U6B, the output end of the operational amplifier U6B is connected with one end of a resistor R29, the other end of the resistor R29 is connected with the non-inverting input end of the operational amplifier U7A, and the non-inverting input end of the resistor R29 is used as the first input end of the voltage tracking module 208, is recorded as a port Vflw-in1, and is connected with the second output end; one end of the resistor R30 is connected with the equidirectional input end of the operational amplifier U7A, and the other end of the resistor R30 is used as a second input end of the voltage tracking module 208, is marked as a port Vwlw-in 2, and is connected with a port Vdly-out of the delay compensation module 207; one end of the resistor R31 is connected with the reverse input end of the operational amplifier U7A, and the other end is connected with a power supply Vcc/2; the output end of the operational amplifier U7A is connected with the gate of a field effect transistor Q2, the drain of a field effect transistor Q2 is connected with a power supply Vcc, the source is connected with one end of an inductor L1 and the cathode of a diode D1, the anode of a diode D1 is grounded, the other end of the inductor L1 is connected with the anode of an electrolytic capacitor C4, the anode of the electrolytic capacitor C5, one end of a capacitor C6 and one end of a capacitor C7, and is used as the output end of the voltage tracking module 208, recorded as a port Vflw-out and connected with a port PWR-in1 of the LD driving module 205; the negative electrode of the electrolytic capacitor C4, the negative electrode of the electrolytic capacitor C5, the other end of the capacitor C6 and the other end of the capacitor C7 are all grounded.
The voltage tracking module 208 automatically adjusts and outputs a voltage Vcc (a fixed value, preferably 48V) to the port PWR-in1 of the LD driving module 205 as a power voltage of a current output loop of the LD driving module 205, the voltage will follow the change of the operating state of the LD, when the driving current of the LD changes and the voltage across the LD changes, the voltage at the port PWR-in1 will not be redundant due to the voltage across the LD decreasing and will not be insufficient due to the voltage across the LD increasing, and always operates in a "critical state", thereby ensuring that the electrical loss of the whole system is always at a minimum. Since the fet Q1 is a non-linear device, the optimum value of the drain-source voltage is related to the drain current. The reference voltage of the load determination module is derived from the control voltage of the LD driving module 205, and when the control voltage changes, the reference voltage of the load determination module 206 and the output current of the LD driving module 205 are simultaneously affected, so that the drain-source voltage of the fet Q1 actively adapts to different optimal values when the output currents are different.
As shown in fig. 7, the structure of the overcurrent determination module 209 according to the present invention is that the equidirectional input end of the operational amplifier U9A is used as the input end of the overcurrent determination module 209, is marked as a port OC-in, and is connected to a port PWR-out3 of the LD driving module 205; one end of the resistor R35 is connected with the reverse input end of the operational amplifier U9A, and the other end is grounded; one end of the resistor R36 is connected with the reverse input end of the operational amplifier U9A, and the other end is connected with one end of the slide rheostat W3; the other end and the slide wire end of the slide rheostat W3 are connected with the output end of the operational amplifier U9A and the equidirectional input end of the operational amplifier U9B; one end of the slide rheostat W4 is connected with a power supply Vdd, the other end of the slide rheostat W4 is grounded, and a slide wire end is connected with the reverse input end of the operational amplifier U9B; the output end of the operational amplifier U9B is used as the output end of the overcurrent judging module 209, and is recorded as the port OC-out, and is connected to one input end of the power-off protection module.
The module detects the current value outputted from the LD driving module 205 to the laser module 1 in real time, and compares the detected current value with a preset safety value (set by the slide rheostat W4 in the figure), and when the actually outputted current exceeds the preset safety value, an overcurrent signal is outputted through the port OC-out to trigger the power-off protection module 211 to perform the power-off operation.
The structure of the over-temperature judging module 210 according to the present invention is shown in fig. 8, a negative electrode of a zener diode D2 is connected to a power supply Vdd, a positive electrode thereof is connected to a non-inverting input terminal of an operational amplifier U10B, an inverting input terminal of the operational amplifier U10B is connected to one end of a capacitor C9, one end of a resistor R38 and an emitter of a diode Q4, the other end of the resistor R38 is connected to the power supply Vdd, the other end of the capacitor C9 is connected to an output terminal of an operational amplifier U10B and one end of a resistor R39, the other end of the resistor R39 is connected to a base of a triode Q4, a collector of the triode Q4 is connected to the inverting input terminal of the operational amplifier U10A, and serves as an input terminal of the over-temperature judging module 210, which is marked as; one end of the resistor R37 is connected with the non-inverting input end of the operational amplifier U10B, and the other end is grounded, and is used as the other input end of the over-temperature judging module 210, which is marked as a port NTC2 and connected with a port NTC-of the laser module 1; one end of the slide rheostat W5 is connected with a power supply Vdd, the other end of the slide rheostat W5 is grounded, and a slide wire end is connected with the equidirectional input end of the operational amplifier U10A; the output end of the operational amplifier U10A is used as the output end of the over-temperature determining module 210, and is marked as OT-out, and is connected to the other input end of the power-off protection module 211.
The module monitors the core temperature of the laser module 1 by detecting the NTC thermistor integrated inside the laser module, and outputs an over-temperature signal through the port OT-out to trigger the power-off protection module 211 to perform a power-off action when the core temperature exceeds a set safe temperature (set by the sliding rheostat W5 in fig. 8).
The structure of the power-off protection module 211 is shown in fig. 9, two input ends of a nand gate U8A are respectively used as two input ends of the power-off protection module 211, which are recorded as a port BRK-in1 and a port BRK-in2, and are respectively connected to the output end of the over-current judgment module 209 and the output end of the over-temperature judgment module 210, an output end of the nand gate U8A is connected to one input end of a nand gate U8B, the other input end of the nand gate U8B is connected to the output end of a nand gate U8C, an output end of the nand gate U8B is connected to one input end of a nand gate U8C and a gate of a field effect transistor Q3, the other input end of the nand gate U8C is connected to one end of a capacitor C8 and one end of a resistor R33, the other end of the resistor R33 is connected to one end of a switch K1 and one end of a resistor R32, the; the source of the fet Q3 is grounded, one end of the resistor R34 is used as a first output terminal of the power-down protection module 211, which is denoted as a port BRK-out1, and is connected to the port PWR-in2 of the LD driving module 205, the other end of the resistor R34 is connected to the drain of the fet Q3, which is used as a second output terminal of the power-down protection module 211, which is denoted as a port BRK-out2, and the port BRK-out2 is simultaneously connected to the port PWR-in3 of the LD driving module 205 and the port Vflw-in1 of the voltage tracking module 208.
Two input ports of the module respectively monitor an overcurrent signal of the overcurrent judgment module 209 and an overtemperature signal of the overtemperature judgment module 210, when any one of the signals has a high level, a power-off action is triggered, namely, the field-effect tube Q3 is controlled to be switched on, the port BRK-out1 is connected with a port PWR-in2 in the LD driving module 205, a relay EK1 in the LD driving module 205 is triggered to switch off a switch, and an energy source in an output current loop is cut off; the port BRK-out2 is connected to the port PWR-in3 of the LD driving module 205 and the port Vflw-in1 of the voltage tracking module 208, so that the voltages at the port PWR-in3 and the port Vflw-in1 are limited to 0, the control voltages of the LD driving module 205 and the voltage tracking module 208 are cut off, and the effectiveness and safety of power failure are further improved. Meanwhile, the power-off protection module 211 adopts a one-way irreversible triggering mode, once the power-off signal triggers the power-off action, even if the power-off signal disappears, the power-off state cannot be released immediately, but the power-off state can be released only by manually pressing the switch K1, so that the triggering signal is prevented from being triggered repeatedly near a critical point of a safety value.
EXAMPLE 9 laser Module
The laser module 1 of this embodiment adopts a laser module with a butterfly package of strapdown diode LC96, and its package and pin schematic diagram is shown in fig. 10, the laser module integrates a laser diode LD, a photodiode PD, a thermoelectric cooler TEC and a thermistor NTC inside, the module has 14 pins in total, wherein, pins 6, 7, 8, 9 and 12 are all empty pins (NC), pins 1 and 14 are two current input terminals (port TEC + and port TEC-) of an internal thermoelectric cooler respectively for connecting with a current output port of a temperature control module 3 (belonging to the prior art and being conventionally designed as required), pins 2 and 5 are two wiring ports (port NTC + and port NTC-) of an internal thermistor for connecting with a thermistor input terminal of a temperature control module 3, and ports + and NTC-are also connected with an input terminal of an over-temperature determination module 210 respectively, pins 3 and 4 are two connection ports (port PD + and port PD-) of the internal integrated photodiode, the current output by the two ports reflects the light power, the two ports are connected to two input terminals of the power sampling module and are used for converting the output light power into a voltage signal, pins 10 and 11 are the anode and cathode (port LD + and port LD-) of the internal laser diode and are respectively connected to port PWR-out2 and port PWR-out3 of LD driving module 205, LD driving module 205 provides a driving current to the internal integrated laser diode to control the output light power thereof, and pin 13 is the grounding end of the housing.
Claims (4)
1. A low-electric-loss laser pumping source system structurally comprises a laser module (1), a power control module (2) and a temperature control module (3), wherein the power control module (2) structurally comprises a power setting module (201), a power sampling module (202), a PID operation module (203), a soft start module (204) and an LD driving module (205), and is characterized in that the power control module (2) structurally comprises a load judgment module (206), a delay compensation module (207), a voltage tracking module (208), an overcurrent judgment module (209), an overtemperature judgment module (210) and a power-off protection module (211);
the structure of the LD driving module (205) is as follows: one end of a switch of the relay EK1 is used as a first input end of the LD driving module (205) and is recorded as a port PWR-in1, the other end of the switch of the relay EK1 is connected with a drain of a field effect transistor Q1 and is used as a first output end of the LD driving module (205) and is recorded as a port PWR-out1, one end of a coil of the relay EK1 is connected with a power supply Vdd, the other end of the switch is used as a second input end of the LD driving module (205) and is recorded as a port PWR-in2, a grid of the field effect transistor Q1 is connected with an output end of an operational amplifier U1A, a source is used as a second output end of the LD driving module (205) and is recorded as a port PWR-out2, one end of a resistor R1 is connected with a non-phase input end of the operational amplifier U1A and is used as a third input end of the LD driving module (205) and is recorded as a port PWR-in3, the other end of, the inverting input end of the operational amplifier U1A is connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the capacitor C1 is connected with the output end of the operational amplifier U1A, the other end of the resistor R2 is connected with one end of a sliding rheostat W1, the slide wire end of the sliding rheostat W1 and the output end of the operational amplifier U1B, the other end of the sliding rheostat W1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the inverting input end of the operational amplifier U1B and one end of a resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1B is connected with one end of a resistor Rs and serves as a third output end of the LD driving module (39205) and is recorded as a port PWR;
the load judgment module (206) has the structure that: the non-inverting input terminal of the operational amplifier U2A is used as the first input terminal of the load judging module (206) and is recorded as a port Vjdg-in1, and is connected with a port PWR-out1 of the LD driving module (205), the inverting input terminal of the operational amplifier U2A is connected with the output terminal of the operational amplifier U2A and one end of a resistor R5, the other end of the resistor R5 is connected with one end of a resistor R6 and the non-inverting input terminal of the operational amplifier U3A, the other end of the resistor R6 is grounded, the output terminal of the operational amplifier U3A is connected with one end of a resistor R8 and one end of a resistor R9, the other end of the resistor R6329 is connected with the inverting input terminal of the operational amplifier U3A and one end of the resistor R7, the other end of the resistor R7 is connected with the inverting input terminal of the operational amplifier U2B and the output terminal 57348, the non-inverting input terminal of the operational amplifier U2 as the load judging module (206) is connected with the port Vjdg-in2, and the PWR 205 is connected with the port, the other end of the resistor R9 is connected with one end of a resistor R10 and a non-inverting input end of an operational amplifier U3B, the other end of the resistor R10 is connected with a power supply Vcc/2, the output end of the operational amplifier U3B is connected with one end of a resistor R12 and serves as the output end of a load judgment module (206) and is recorded as a port Vjdg-out, the output end of the load judgment module is connected with the input end of a delay compensation module (207), the other end of the resistor R12 is connected with an inverting input end of an operational amplifier U3B and one end of R11, the other end of the resistor R11 is connected with the output end of an operational amplifier U4B and the inverting input end of the operational amplifier U4B, the non-inverting input end of the operational amplifier U4B is connected with a slide terminal of a slide rheostat W2, one end of the slide rheostat W2 is grounded, the other end of the load judgment module (206) serves as a third input end and is recorded as a port;
the structure of the delay compensation module (207) is as follows: one end of a resistor R13 is connected with one end of a resistor R18, and is used as an input end of a delay compensation module (207) and is recorded as a port Vdly-in, and is connected with a port Vjdg-out of a load judging module (206), the other end of the resistor R13 is connected with an inverting input end of an operational amplifier U4A and one end of a resistor R15, a non-inverting input end of the operational amplifier U4A is connected with one end of a resistor R14, the other end of the resistor R14 is connected with a power supply Vcc/2, the other end of the resistor R15 is connected with an output end of an operational amplifier U4A and one end of a resistor R16, the other end of the resistor R16 is connected with one end of a resistor R17, one end of a resistor R21 and an inverting input end of an operational amplifier U5A, the other end of a resistor R17 is connected with an output end of an operational amplifier U5A and is used as an output end of a delay compensation module (207) and is recorded as a port Vdd-out, and is connected with a non-inverting input end of a resistor U, the other end of the resistor R22 is connected with a power supply Vcc/2, the other end of the resistor R21 is connected with one end of a resistor R20, one end of a capacitor C2 and the output end of the operational amplifier U5B, the other end of the resistor R20 is connected with the other end of a capacitor C2, the inverting input end of the operational amplifier U5B and the other end of the resistor R18, one end of the resistor R19 is connected with the non-inverting input end of the operational amplifier U5B, and the other end of the resistor R19 is connected with the power supply Vcc;
the structure of the voltage tracking module (208) is that one end of a resistor R23 is connected with a power supply Vcc/2, the other end of the resistor R23 is connected with the reverse input end of an operational amplifier U6A, the non-inverting input end of the operational amplifier U6A is connected with one end of a resistor R24 and one end of a resistor R25, the other end of a resistor R24 is connected with the output end of an operational amplifier U6A, the other end of a resistor R25 is connected with the output end of an operational amplifier U6B, one end of a resistor R26 is connected with the output end of an operational amplifier U6A, and the other end of the resistor R26 is connected with the reverse; one end of the resistor R27 is connected with the non-inverting input end of the operational amplifier U6B, and the other end is connected with a power supply Vcc/2; one end of a capacitor C3 and one end of a resistor R28 are connected with the reverse input end of the operational amplifier U6B, the other end of the capacitor C3 is connected with the output end of the operational amplifier U6B, the output end of the operational amplifier U6B is connected with one end of a resistor R29, the other end of the resistor R29 is connected with the non-inverting input end of the operational amplifier U7A, and the non-inverting input end of the resistor R29 is used as the first input end of the voltage tracking module (208), is recorded as a port Vflw-in1, and is connected with the second output end of the power; one end of the resistor R30 is connected with the non-inverting input end of the operational amplifier U7A, the other end of the resistor R30 is used as the second input end of the voltage tracking module (208), is recorded as a port Vvlw-in 2 and is connected with a port Vdly-out of the delay compensation module (207); one end of the resistor R31 is connected with the reverse input end of the operational amplifier U7A, and the other end is connected with a power supply Vcc/2; the output end of the operational amplifier U7A is connected with the grid of a field effect transistor Q2, the drain of a field effect transistor Q2 is connected with a power supply Vcc, the source is connected with one end of an inductor L1 and the cathode of a diode D1, the anode of a diode D1 is grounded, the other end of the inductor L1 is connected with the anode of an electrolytic capacitor C4, the anode of the electrolytic capacitor C5, one end of a capacitor C6 and one end of a capacitor C7, the output ends of a voltage tracking module (208) are used as ports Vflw-out and are connected with a port PWR-in1 of an LD driving module (205); the negative electrode of the electrolytic capacitor C4, the negative electrode of the electrolytic capacitor C5, the other end of the capacitor C6 and the other end of the capacitor C7 are all grounded;
the structure of the overcurrent judgment module (209) is that the non-inverting input end of the operational amplifier U9A is used as the input end of the overcurrent judgment module (209), is marked as a port OC-in, and is connected with a port PWR-out3 of the LD driving module (205); one end of the resistor R35 is connected with the reverse input end of the operational amplifier U9A, and the other end is grounded; one end of the resistor R36 is connected with the reverse input end of the operational amplifier U9A, and the other end is connected with one end of the slide rheostat W3; the other end and the slide wire end of the slide rheostat W3 are connected with the output end of the operational amplifier U9A and the non-inverting input end of the operational amplifier U9B; one end of the slide rheostat W4 is connected with a power supply Vdd, the other end of the slide rheostat W4 is grounded, and a slide wire end is connected with the reverse input end of the operational amplifier U9B; the output end of the operational amplifier U9B is used as the output end of the overcurrent judgment module (209), is recorded as a port OC-out and is connected with one input end of the power-off protection module;
the structure of the over-temperature judging module (210) is that the negative electrode of a voltage-stabilizing diode D2 is connected with a power supply Vdd, the positive electrode of the voltage-stabilizing diode D2 is connected with the non-inverting input end of an operational amplifier U10B, the inverting input end of the operational amplifier U10B is connected with one end of a capacitor C9, one end of a resistor R38 and the emitter of a diode Q4, the other end of the resistor R38 is connected with the power supply Vdd, the other end of the capacitor C9 is connected with the output end of an operational amplifier U10B and one end of a resistor R39, the other end of the resistor R39 is connected with the base of a triode Q4, the collector of the triode Q4 is connected with the inverting input end of the operational amplifier U10A and serves as one input end of the over-temperature judging module (210), which is marked; one end of the resistor R37 is connected with the non-inverting input end of the operational amplifier U10B, the other end of the resistor R37 is grounded, is used as the other input end of the over-temperature judgment module (210), is marked as a port NTC2 and is connected with a port NTC-of the laser module (1); one end of the slide rheostat W5 is connected with a power supply Vdd, the other end of the slide rheostat W5 is grounded, and a slide wire end is connected with a non-inverting input end of the operational amplifier U10A; the output end of the operational amplifier U10A is used as the output end of the over-temperature judgment module (210), is marked as OT-out and is connected with the other input end of the power-off protection module (211);
the power-off protection module (211) is structurally characterized in that two input ends of a NAND gate U8A are respectively used as two input ends of the power-off protection module (211) and are recorded as a port BRK-in1 and a port BRK-in2, and are respectively connected with the output end of the over-current judgment module (209) and the output end of the over-temperature judgment module (210), the output end of the NAND gate U8A is connected with one input end of a NAND gate U8B, the other input end of the NAND gate U8B is connected with the output end of a NAND gate U8C, the output end of the NAND gate U8B is connected with one input end of a NAND gate U8C and the gate of a field effect tube Q3, the other input end of the NAND gate U8C is connected with one end of a capacitor C8 and one end of a resistor R33, the other end of the resistor R33 is connected with one end of a switch K1 and one end of a resistor R32, the other end; the source of the field effect transistor Q3 is grounded, one end of the resistor R34 is used as a first output end of the power-off protection module (211) and is marked as a port BRK-out1, and is connected with a port PWR-in2 of the LD driving module (205), the other end of the resistor R34 is connected with the drain of the field effect transistor Q3 and is used as a second output end of the power-off protection module (211) and is marked as a port BRK-out2, and the port BRK-out2 is simultaneously connected with the port PWR-in3 of the LD driving module (205) and the port Vflw-in1 of the voltage tracking module (208).
2. The system of claim 1, wherein the power supply Vcc, Vcc/2, Vdd are 48V, 24V, and 5V, respectively.
3. A low electrical loss laser pump source system as claimed in claim 1, wherein said delay compensation module (207) circuit parameters are: the resistors R13 and R14 are 4K, R15 is 40K, R16 and R21 are 20K, R17 and R20 are 10K, R18 and R19 are 1K, R22 is 5.1K, and the capacitor C2 is 5 PF.
4. The low electrical loss laser pump source system according to claim 1, wherein the laser module (1) is a strapdown LC96 butterfly package laser module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598671.7A CN109449739B (en) | 2018-12-26 | 2018-12-26 | Laser pumping source system with low electric loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598671.7A CN109449739B (en) | 2018-12-26 | 2018-12-26 | Laser pumping source system with low electric loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109449739A CN109449739A (en) | 2019-03-08 |
| CN109449739B true CN109449739B (en) | 2020-05-22 |
Family
ID=65535687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598671.7A Expired - Fee Related CN109449739B (en) | 2018-12-26 | 2018-12-26 | Laser pumping source system with low electric loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109449739B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071934A (en) * | 2006-05-11 | 2007-11-14 | 三菱电机株式会社 | Laser diode drive circuit |
| CN101567519A (en) * | 2009-05-27 | 2009-10-28 | 北京国科世纪激光技术有限公司 | Large-current pulse LD laser driving power supply |
| CN103066493A (en) * | 2013-01-14 | 2013-04-24 | 长春长理光学精密机械有限公司 | Semiconductor laser unit driving power supply with over-temperature protection function |
| CN103701033A (en) * | 2013-11-26 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Work protection system for DFB (distributed feed back) laser |
| CN205724364U (en) * | 2016-04-12 | 2016-11-23 | 深圳清华大学研究院 | Laser power supply |
| CN108832478A (en) * | 2018-06-21 | 2018-11-16 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of efficient laser control system and control method |
| CN108933380A (en) * | 2017-05-29 | 2018-12-04 | 株式会社岛津制作所 | Laser device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5803174B2 (en) * | 2010-09-09 | 2015-11-04 | 富士通株式会社 | Driving circuit |
-
2018
- 2018-12-26 CN CN201811598671.7A patent/CN109449739B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071934A (en) * | 2006-05-11 | 2007-11-14 | 三菱电机株式会社 | Laser diode drive circuit |
| CN101567519A (en) * | 2009-05-27 | 2009-10-28 | 北京国科世纪激光技术有限公司 | Large-current pulse LD laser driving power supply |
| CN103066493A (en) * | 2013-01-14 | 2013-04-24 | 长春长理光学精密机械有限公司 | Semiconductor laser unit driving power supply with over-temperature protection function |
| CN103701033A (en) * | 2013-11-26 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Work protection system for DFB (distributed feed back) laser |
| CN205724364U (en) * | 2016-04-12 | 2016-11-23 | 深圳清华大学研究院 | Laser power supply |
| CN108933380A (en) * | 2017-05-29 | 2018-12-04 | 株式会社岛津制作所 | Laser device |
| CN108832478A (en) * | 2018-06-21 | 2018-11-16 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of efficient laser control system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109449739A (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2127486C (en) | Optical amplifier | |
| CN109412001B (en) | Digital high-efficiency laser pumping source | |
| CN109412005B (en) | Program-controlled high-efficiency laser pumping source module | |
| CN106207730B (en) | A kind of high stability laser pumping source with overheat protection function | |
| EP1437806B1 (en) | Pulse oscillation solid-state laser apparatus and laser machining apparatus | |
| CN109412002B (en) | High-efficiency laser pumping source device | |
| CN109449739B (en) | Laser pumping source system with low electric loss | |
| CN109346908B (en) | Portable high-efficiency laser pumping source module | |
| CN109713564B (en) | Impedance self-adaptive laser diode driver | |
| CN109613952B (en) | Load self-adaptive constant current generating circuit | |
| CN109546528B (en) | Impedance self-adaptive laser diode driving circuit | |
| CN109524876B (en) | Program-controlled impedance self-adaptive laser diode driving module | |
| CN106129794B (en) | A kind of high stability laser beam generating circuit based on PID control | |
| CN109346918B (en) | Portable impedance self-adaptive laser diode driving module | |
| CN109634345B (en) | Program-controlled load self-adaptive variable voltage constant current source module | |
| CN217115153U (en) | Adjusting circuit and laser processing equipment | |
| CN109659811B (en) | Digital impedance self-adaptive laser diode driver | |
| CN109491441B (en) | Load self-adaptive constant current source module | |
| CN109445506B (en) | Portable voltage tracking type constant current source module | |
| CN109656297B (en) | Program-controlled load self-adaptive constant current source module | |
| CN109358696B (en) | Load self-adaptive variable voltage constant current source circuit | |
| CN109343637B (en) | Voltage tracking type constant current source device | |
| CN109491436B (en) | Digital load self-adaptive constant current driver | |
| CN212908511U (en) | Double closed-loop negative feedback control system based on laser | |
| CN109474177B (en) | Digital load self-adaptive variable voltage constant current source circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 Termination date: 20201226 |