CN2831538Y - Digital semiconductor laser driving power source - Google Patents
Digital semiconductor laser driving power source Download PDFInfo
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- CN2831538Y CN2831538Y CN 200520095018 CN200520095018U CN2831538Y CN 2831538 Y CN2831538 Y CN 2831538Y CN 200520095018 CN200520095018 CN 200520095018 CN 200520095018 U CN200520095018 U CN 200520095018U CN 2831538 Y CN2831538 Y CN 2831538Y
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Abstract
The utility model discloses a digital semiconductor laser driving power supply source which is composed of a single chip computer CPU, an A/D switching circuit, a D/A switching circuit, an optical power and temperature sampling amplifying circuit, a current source driving circuit, a constant temperature control circuit, a keyboard and display circuit, and a freezer. Optical power and temperature sampling circuit amplifies optical power and temperature sampling analog signals and transmits the optical power and temperature sampling analog signals to the A/D switching circuit, and thus, the optical power and temperature sampling analog signals are converted into digital signals and then transmitted to the CPU for operational processing. Output control signals of the constant temperature control circuit are connected with the freezer. The utility model uses computer control and adopts the semiconductor refrigeration technique for realizing the stabilization and the accurate control of the parameters of output power, wavelength, etc., of the semiconductor laser, and simultaneously, the reliable automatic protection of the system of the semiconductor laser device is realized so that the service life is extended. The utility model has the advantages of small size, high cost performance and good adaptability and overcomes the defect of the performance of the traditional pure analogue driving system, and thus, the loss of expensive laser units damaged by artificial incorrect operation is avoided.
Description
Technical field
The utility model relates to a kind of drive electric power unit, relates in particular to a kind of digital semiconductor Laser Driven supply unit.
Background technology
Because semiconductor laser light radiation wavelength and power output and drive current, junction temperature have very big relation, the fluctuating of electric current, temperature can cause the variation of luminous power, or cause the drift of laser frequency, what influence was exported is accurate, stable, except that the bulk of optical feedback method, the feedback regulation of temperature, operating current is a kind of effective means of control semiconductor laser output characteristic.In addition, the voltage or the current spike of multiple transient states such as static, high pressure, surge current and electrical network impact all are easy to damage laser, shorten its useful life.For this reason, people pay very big effort and develop precision, stable, reliable Laser Driven system.Development along with laser technology, commercialization semiconductor laser power output is increasing, wave-length coverage covers visible and infrared, have characteristics such as volume is little, in light weight, the driving of efficient high and low pressure in addition, thereby they are in spectral technique, optical heterodyne detection, optical fiber communication, high power solid-state laser pumping, medical treatment, processing, and even field such as laser cooling experiment obtains using more and more widely.Therefore, the problem of relevant its drive electric power unit arrives people's attention more.The pure analog hardware circuit of the general employing of traditional semiconductor laser drive system, but they are often unsatisfactory aspect runnability and reliability, especially in use, the improper permanent damage that is easy to cause laser of operation operation, not only influence work, for in, high power device, it is corresponding that to consume loss also very big.
Summary of the invention
The purpose of this utility model is: overcome the above-mentioned defective of prior art, provide a kind of volume little, ratio of performance to price height, the digital semiconductor Laser Driven supply unit that adaptability is good, the life-span is long.
The utility model is by singlechip CPU, the A/D change-over circuit, the D/A change-over circuit, luminous power and temperature sampling amplifying circuit, the driven with current sources circuit, constant temperature control circuit, keyboard and display circuit, refrigerator constitutes, luminous power and temperature sampling amplifying circuit are delivered to the A/D circuit with luminous power and temperature sampling analog signal after amplifying, being converted to digital signal sends into CPU and carries out calculation process, feedback control signal is sent to driven with current sources circuit and constant temperature control circuit respectively again after the conversion of D/A change-over circuit, form the closed-loop control of luminous power and temperature, the A/D change-over circuit, the D/A change-over circuit hangs on the singlechip CPU bus, keyboard connects the parallel expansion mouth of RAM of singlechip CPU, constant temperature control circuit output control signal is connected to refrigerator, in order to control LD refrigerator refrigeration or to heat, regulate the temperature of semiconductor laser LD.
The utility model utilization computer control organically in conjunction with software and hardware, and is adopted semiconductor refrigerating technology, realizes semiconductor laser power output, isoparametric stable, the accurately control of wavelength; Thereby the reliable protection automatically that has realized system's noise spectra of semiconductor lasers simultaneously prolongs its useful life.This system bulk is little, ratio of performance to price height, and adaptability is good, has remedied the deficiency on traditional pure analog drive system performance, can avoid the improper destruction loss that causes expensive Laser Devices of manual operation.The utility model is simple in structure, practical, cost is low, effective.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the circuit connection diagram of the utility model D/A change-over circuit;
Fig. 3 is the circuit connection diagram of the utility model A/D change-over circuit;
Fig. 4 is the utility model abnormity of power supply warning circuit;
Fig. 5 is the circuit diagram of the utility model driven with current sources circuit;
Fig. 6 is temperature sampling circuit in the utility model luminous power and the temperature sampling amplifying circuit and the connection layout between constant temperature control circuit;
Fig. 7 is the circuit diagram of the luminous power sample circuit in the utility model luminous power and the temperature sampling amplifying circuit.
Embodiment
Below in conjunction with embodiment the utility model is elaborated.
Present embodiment is made of singlechip CPU, A/D change-over circuit 1, D/A change-over circuit 2, luminous power and temperature sampling amplifying circuit 3, driven with current sources circuit 4, constant temperature control circuit 5, keyboard and display circuit 6, refrigerator 7 and abnormity of power supply warning circuit.Luminous power and temperature sampling amplifying circuit 3 are delivered to A/D circuit 1 with luminous power and temperature sampling analog signal after amplifying, being converted to digital signal sends into CPU and carries out calculation process, feedback control signal is sent to driven with current sources circuit 4 and constant temperature control circuit 5 respectively again after 2 conversions of D/A change-over circuit, form the closed-loop control of luminous power and temperature, A/D change-over circuit 1, D/A change-over circuit 2 hangs on the singlechip CPU bus, keyboard 4 connects the parallel expansion mouth of RAM of singlechip CPU, constant temperature control circuit 3 output control signals are connected to refrigerator 7, in order to control LD refrigerator 7 refrigeration or to heat, regulate the temperature of semiconductor laser LD.
A/D change-over circuit 1 is made of A/D change-over circuit IC1, finish signal output part pin 7 by turns and be connected to singlechip CPU INT1 through a not gate NO1,8 bit data output pin 8,14,15,17,18-21 connects singlechip CPU P00-P07 mouth, transformation result is sent to singlechip CPU, A/D IC circuit 13 bit address input pin 23,24,25 respectively with data output end pin 15,14,17 link to each other, singlechip CPU is read, write end pin 17,16 be connected to one with the door input, be connected to A/D change-over circuit IC1 address latch enabling signal end pin 22 through a not gate again through this output, singlechip CPU P23 mouth, singlechip CPU read to hold pin 17 be connected to one with the door input, be connected to A/D change-over circuit IC1 pin 9 through a not gate again through this output, enabling signal input pin 6 links to each other with address latch enabling signal end pin 22; Singlechip CPU data port P00-P07 links to each other with D/A change-over circuit IC2 pin 13-16,4-7 respectively; Luminous power and temperature sampling amplifying circuit 3 comprise luminous power sample circuit and temperature sampling amplifying circuit.The luminous power sample circuit is by photodiode PD, amplifier AR6, variable resistor R1, resistance R 2, R3, photodiode PD one termination amplifier AR6 "+" end, resistance R 2, the cross-over connection of R3 series arm are between AR6 "+", "-" end, intermediate point ground connection, variable resistor R1 cross-over connection is between amplifier AR6 output and "-" end.The temperature sampling amplifying circuit is made up of regulator block U2, amplifier U1, resistance R 4-R7, capacitor C 1, C2, resistance R 7 cross-over connections are in 2,3 on regulator block U2 pin, between resistance R 5 cross-over connection regulator block U2 pin 3 and ground, capacitor C 1 cross-over connection is in resistance R 5 one ends and central slide end, connect amplifier U1 pin 2 behind resistance R 8 series resistor R7 one end, resistance R 4 cross-over connections are between amplifier U1 pin 2 and ground, resistance R 6 cross-over connections are in 1 on amplifier U1 pin 3 and output pin, amplifier U1 output is connected to the A/D change-over circuit, is connected to capacitor C 2 between amplifier U1 output and ground.Constant temperature control circuit 5 is made of sampling hold circuit and push-pull output circuit, sampling hold circuit keeps integrated package U4, amplifier U3 to constitute by resistance R 9-R12, capacitor C 3-C5 and sampling, sampling keeps cross-over connection capacitor C 3 between integrated package U4 pin 6 and ground, sampling keeps cross-over connection capacitor C 4 between integrated package U4 output pin 3 and ground, the series arm cross-over connection of resistance R 10 and R11 keeps between integrated package U4 output pin 3 and amplifier U3 "+" end in sampling, resistance R 12 cross-over connections are in amplifier "-" end and push-pull circuit input, and resistance R 9 cross-over connections are between amplifier "-" end and ground.The typical push-pull circuit that push-pull circuit is made of amplifier U5, resistance R 13, capacitor C 6, C7 and triode Q1, Q2, push-pull circuit output termination refrigerator 7.Driven with current sources circuit 4 is made of optocoupler interface circuit, current rectifying and wave filtering circuit, sampling hold circuit, current source circuit, overcurrent observation circuit, overvoltage observation circuit, short-circuit protection circuit.The optocoupler interface circuit is made of resistance R 14, R15 optocoupler S1, S2.Current rectifying and wave filtering circuit is made of transformer LO, relay K O, triode Q7 and filter F1.Sampling hold circuit keeps integrated package U6, capacitor C 8-C10, resistance R 16 to constitute by sampling; Over-current detection circuit is made of optocoupler S3, not gate U7, resistance R 18-R21, amplifier U8 and capacitor C 11, and current source circuit is made of two amplifier U9, U10 and Darlington transistor Q3, triode Q5, MOS switching tube Q4, resistance R 22-R27, diode D1-D2, capacitor C 12, C13, C14; The overvoltage observation circuit is by optocoupler S4, resistance R 28-R31, and diode D3, amplifier U11, filter F2 constitute.Short-circuit protection circuit is made of relay K 1, resistance R 32, R33, triode Q6, diode D4.Resistance R 14, R15 are connected to optocoupler S1, S2 input in the optocoupler interface circuit, and optocoupler S1, S2 output are connected to triode Q6, Q5 base stage through resistance R 33, R26 respectively.Sampling keeps integrated package U6 input termination D/A change-over circuit output.Relay K 0 in the current rectifying and wave filtering circuit connects triode Q7 emitter, its normally opened contact cross-over connection transformer LO and filter F1 input.Sampling keeps integrated package U6 output pin to connect amplifier U9 input through resistance R 16, Shu Ru signal is through amplifier U9 thus, the amplification of U10 secondary exports triode Q3 base stage to, capacitor C 9, C10 one end is connecting resistance R16 two ends respectively, the other end all is connected to ground, optocoupler S3 output connects not gate U7 input between the pin of capacitor C 8 cross-over connections sampling maintenance integrated package U6 and ground, an other input is connected to ground through resistance R 19, MOS switching tube Q4 grid is connected to amplifier U8 input pin 1 through resistance R 23, amplifier U8 output pin connects resistance R 18 successively, connect optocoupler S3 input behind the R17, resistance R 20, the series arm one end ground connection of R21, one termination, intermediate contact is connected to capacitor C 11 1 ends, capacitor C 11 other end ground connection, variable resistor R20 centre cap connects another input of amplifier U8.Triode Q6 emitter and ground span succeed electrical equipment K1 and diode D4, relay K 1 and meet diode D1, capacitor C 12, C13 after again cross-over connection in filter F2 input, filter F2 output cross-over connection LD refrigerator 7.Capacitor C 13 1 end ground connection, the other end connects amplifier U11 input after resistance R 31, and another input of amplifier U11 is successively through resistance R 28, the R29 input to optocoupler S4, and amplifier U11 output is successively through resistance R 30, the R29 input to optocoupler S4.Darlington transistor Q3 emitter is connected to switching tube Q4 grid through resistance R 22, switching tube Q4 base stage and grid span connecting resistance R23, and switching tube Q4 base stage links to each other with triode Q5 collector electrode.Triode Q5 base stage is connected to rectification filter circuit output end through resistance R 24, connect amplifier U11 power input after the parallel branch of another output series resistor R27 of current rectifying and wave filtering circuit and capacitor C 14, electric capacity D2 cross-over connection is between current rectifying and wave filtering circuit one output and amplifier U11 power input.The abnormity of power supply warning circuit, comprise warning circuit and indicating circuit, warning circuit is by resistance R 41-R46, triode BG1, BG2, BG3, BG4, loud speaker S constitutes, indicating circuit is by resistance R 47-R55, triode BG5-BG8, LED 1-LED5 constitutes, singlechip CPU pin 1,2,3,5,7,8 respectively through resistance R 44, R46, R44, R49, R45, R50, meet triode BG4, BG3, BG5, BG6, BG2, the BG8 base stage, resistance R 52, R53, R54, R55 is respectively triode BG5, BG6, BG7, BG8 collector bias resistance, the other end links to each other after resistance R 51 links to each other with power supply indication diode (LED) 1, LED2, LED3, LED4, LED5 one end respectively with BG5, BG6, BG7, the BG8 emitter links to each other, and the LED1-LED5 other end all links to each other with ground.
Through test, main performance index of the present utility model is as follows under-10 ℃-50 ℃ ambient temperature:
1) constant-current source output: 0-3.8A is adjustable continuously, and power supply load regulation rate is better than 0.4%
2) laser output power: 0-2W is adjustable continuously, and stability is better than 0.1%
3) the laser works temperature is 24 ℃, temperature control precision ± 0.3 ℃
4) because adopt based on the relay protection software control under, start slowly, close slowly, measures such as luminous power is adjusted slowly, high-pressure and overflowing protection, Laser Devices are had reliable automatic protective effect.
Claims (4)
1, a kind of digital semiconductor Laser Driven supply unit, it is characterized in that: by single-chip microcomputer (CPU), A/D change-over circuit (1), D/A change-over circuit (2), luminous power and temperature sampling amplifying circuit (3), driven with current sources circuit (4), constant temperature control circuit (5), keyboard and display circuit (6), refrigerator (7) constitutes, luminous power and temperature sampling amplifying circuit (3) are delivered to A/D circuit (1) with luminous power and temperature sampling analog signal after amplifying, being converted to digital signal sends into (CPU) and carries out calculation process, feedback control signal is sent to driven with current sources circuit (4) and constant temperature control circuit (5) respectively again after D/A change-over circuit (2) conversion, form the closed-loop control of luminous power and temperature, A/D change-over circuit (1), D/A change-over circuit (2) hangs on the singlechip CPU bus, keyboard (4) connects the parallel expansion mouth of RAM of single-chip microcomputer (CPU), constant temperature control circuit (3) output control signal is connected to refrigerator (7), freeze or heat in order to control refrigerator (7), regulate the temperature of semiconductor laser (LD).
2, digital semiconductor Laser Driven supply unit according to claim 1, it is characterized in that: A/D change-over circuit (1) is made of A/D change-over circuit (IC1), finish signal output part pin 7 by turns and be connected to single-chip microcomputer (CPU) INT1 through a not gate NO1,8 bit data output pin 8,14,15,17,18-21 connects singlechip CPU P00-P07 mouth, transformation result is sent to single-chip microcomputer (CPU), A/D circuit (IC1) 3 bit address input pin 23,24,25 respectively with data output end pin 15,14,17 link to each other, single-chip microcomputer (CPU) is read, write end pin 17,16 be connected to one with the door input, be connected to A/D change-over circuit (IC1) address latch enabling signal end pin 22 through a not gate again through this output, single-chip microcomputer (CPU) P23 mouth, single-chip microcomputer (CPU) read to hold pin 17 be connected to one with the door input, be connected to A/D change-over circuit (IC1) pin 9 through a not gate again through this output, enabling signal input pin 6 links to each other with address latch enabling signal end pin 22; Single-chip microcomputer (CPU) data port P00-P07 links to each other with D/A change-over circuit (IC2) pin 13-16,4-7 respectively.
3. digital semiconductor Laser Driven supply unit according to claim 1 and 2, it is characterized in that: luminous power and temperature sampling amplifying circuit (3) comprise luminous power sample circuit and temperature sampling amplifying circuit, the luminous power sample circuit is by photodiode (PD), amplifier (AR6), variable resistor (R1), resistance (R2, R3), photodiode (PD) termination amplifier (AR6) "+" end, resistance (R2, R3) the series arm cross-over connection is in (AR6) "+", between "-" end, intermediate point ground connection, variable resistor (R1) cross-over connection is between amplifier (AR6) output and "-" end, the temperature sampling amplifying circuit is by regulator block (U2), amplifier (U1), resistance (R4-R7), electric capacity (C1, C2) form, resistance (R7) cross-over connection is in regulator block (U2) pin 2,3, between resistance (R5) cross-over connection regulator block (U2) pin 3 and ground, electric capacity (C1) cross-over connection is in resistance (R5) end and central slide end, connect amplifier (U1) pin 2 behind resistance (R8) series resistor (R7) end, resistance (R4) cross-over connection is between amplifier (U1) pin 2 and ground, resistance (R6) cross-over connection is in 1 on amplifier (U1) pin 3 and output pin, amplifier (U1) output is connected to the A/D change-over circuit, is connected to capacitor C 2 between amplifier U1 output and ground; Constant temperature control circuit (5) is made of sampling hold circuit and push-pull output circuit, sampling hold circuit is by resistance (R9-R12), electric capacity (C3-C5) and sampling keep integrated package (U4), amplifier (U3) constitutes, sampling keeps cross-over connection electric capacity (C3) between integrated package (U4) pin 6 and ground, sampling keeps cross-over connection electric capacity (C4) between integrated package (U4) output pin 3 and ground, resistance (R10) and series arm cross-over connection (R11) keep between integrated package (U4) output pin 3 and amplifier (U3) "+" end in sampling, resistance (R12) cross-over connection is in amplifier "-" end and push-pull circuit input, and resistance (R9) cross-over connection is between amplifier "-" end and ground; The typical push-pull circuit that push-pull circuit is made of amplifier (U5), resistance (R1 3), electric capacity (C6, C7) and triode (Q1, Q2), push-pull circuit output termination refrigerator (7); Driven with current sources circuit (4) is made of optocoupler interface circuit, current rectifying and wave filtering circuit, sampling hold circuit, current source circuit, overcurrent observation circuit, overvoltage observation circuit, short-circuit protection circuit; The optocoupler interface circuit is made of resistance (R14, R15), optocoupler (S1, S2); Current rectifying and wave filtering circuit is made of transformer (L0), relay (K0), triode (Q7) and filter (F1); Sampling hold circuit keeps integrated package (U6), electric capacity (C8-C10), resistance (R16) to constitute by sampling; Over-current detection circuit is made of optocoupler (S3), not gate (U7), resistance (R18-R21), amplifier (U8) and electric capacity (C11), and current source circuit is made of two amplifiers (U9, U10) and Darlington transistor (Q3), triode (Q5), MOS switching tube (Q4), resistance (R22-R27), diode (D1-D2), electric capacity (C12, C13, C14); The overvoltage observation circuit is by optocoupler (S4), resistance (R28-R31), and diode (D3), amplifier (U11), filter (F2) constitute; Short-circuit protection circuit is made of relay (K1), resistance (R32, R33), triode (Q6), diode (D4); Resistance in the optocoupler interface circuit (R14, R15) is connected to optocoupler (S1, S2) input, and optocoupler (S1, S2) output is connected to triode (Q6, Q5) base stage through resistance (R33, R26) respectively; Sampling keeps integrated package (U6) input termination D/A change-over circuit output; Relay in the current rectifying and wave filtering circuit (K0) connects triode (Q7) emitter, its normally opened contact cross-over connection transformer (L0) and filter (F1) input; Sampling keeps integrated package (U6) output pin to connect amplifier (U9) input through resistance (R16), Shu Ru signal is through amplifier (U9 thus, U10) the secondary amplification exports triode (Q3) base stage to, electric capacity (C9, C10) end difference connecting resistance (R16) two ends, the other end all is connected to ground, optocoupler (S3) output connects not gate (U7) input between the pin 6 of electric capacity (C8) cross-over connection sampling maintenance integrated package (U6) and ground, an other input is connected to ground through resistance (R19), MOS switching tube (Q4) grid is connected to amplifier (U8) input pin 1 through resistance (R23), amplifier (U8) output pin connects resistance (R18 successively, R17) connect optocoupler (S3) input after, resistance (R20, R21) series arm one end ground connection, one termination, intermediate contact is connected to electric capacity (C11) end, electric capacity (C11) other end ground connection, variable resistor (R20) centre cap connects another input of amplifier (U8); Triode (Q6) emitter and ground span succeed electrical equipment (K1) and diode (D4), relay (K1) and connect diode (D1), electric capacity (C12, C13) after again cross-over connection in filter (F2) input, filter (F2) output cross-over connection refrigerator (7); Electric capacity (C13) end ground connection, the other end connects amplifier (U11) input behind resistance (R31), another input of amplifier (U11) is successively through the input of resistance (R28, R29) to optocoupler (S4), and amplifier (U11) output is successively through the input of resistance (R30, R29) to optocoupler (S4); Darlington transistor (Q3) emitter is connected to switching tube (Q4) grid through resistance (R22), switching tube (Q4) base stage and grid span connecting resistance (R23), and switching tube (Q4) base stage links to each other with triode (Q5) collector electrode; Triode (Q5) base stage is connected to rectification filter circuit output end through resistance (R24), connect amplifier (U11) power input after the parallel branch of another output series resistor (R27) of current rectifying and wave filtering circuit and electric capacity (C14), electric capacity (D2) cross-over connection is between current rectifying and wave filtering circuit one output and amplifier (U11) power input.
4, digital semiconductor Laser Driven supply unit according to claim 1 and 2, it is characterized in that: be provided with the abnormity of power supply warning circuit, comprise warning circuit and indicating circuit, warning circuit is by resistance (R41-R46), triode (BG1, BG2, BG3, BG4), loud speaker (S) constitutes, indicating circuit is by resistance (R47-R55), triode (BG5-BG8), light-emitting diode (LED1-LED5) constitutes, single-chip microcomputer (CPU) pin 1,2,3,5,7,8 respectively through resistance (R44, R46, R44, R49, R45, R50), meet triode (BG4, BG3, BG5, BG6, BG2, BG8) base stage, resistance (R52, R53, R54, R55) be respectively triode (BG5, BG6, BG7, BG8) collector bias resistance, the other end links to each other after resistance (R51) links to each other with power supply indication diode (LED1), diode (LED2, LED3, LED4, LED5) end respectively with triode (BG5, BG6, BG7, BG8) emitter links to each other, and diode (LED1-LED5) other end all links to each other with ground.
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| CN 200520095018 CN2831538Y (en) | 2005-01-21 | 2005-01-21 | Digital semiconductor laser driving power source |
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| CN 200520095018 CN2831538Y (en) | 2005-01-21 | 2005-01-21 | Digital semiconductor laser driving power source |
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| CN101175352B (en) * | 2007-09-04 | 2011-03-30 | 浙江大学 | Numerical control driving method and device of super-radiance light emitting diode |
| CN101694922B (en) * | 2009-10-19 | 2011-03-30 | 浙江大学 | System for controlling stability of high-stability semiconductor laser light source |
| CN102522696A (en) * | 2011-11-30 | 2012-06-27 | 江苏飞格光电有限公司 | Closed-loop digital liquid diode (LD) laser driving circuit |
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| CN101175352B (en) * | 2007-09-04 | 2011-03-30 | 浙江大学 | Numerical control driving method and device of super-radiance light emitting diode |
| CN101694922B (en) * | 2009-10-19 | 2011-03-30 | 浙江大学 | System for controlling stability of high-stability semiconductor laser light source |
| CN102522696A (en) * | 2011-11-30 | 2012-06-27 | 江苏飞格光电有限公司 | Closed-loop digital liquid diode (LD) laser driving circuit |
| CN103280694A (en) * | 2013-05-27 | 2013-09-04 | 四川大学 | FPGA (Field programmable gate array)-based driving power supply device of high-power pulse semiconductor laser unit |
| CN103441423A (en) * | 2013-09-02 | 2013-12-11 | 中国电子科技集团公司第三十四研究所 | Narrow-linewidth tunable laser system and operation method thereof |
| CN103441423B (en) * | 2013-09-02 | 2016-02-10 | 中国电子科技集团公司第三十四研究所 | Narrow-linewidth tunable laser system and operation method |
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| CN106527526A (en) * | 2015-09-11 | 2017-03-22 | 无锡南理工科技发展有限公司 | Temperature control circuit for silicon drift detector |
| CN106527526B (en) * | 2015-09-11 | 2019-06-14 | 无锡南理工科技发展有限公司 | A kind of silicon drifting detector (SDD) temperature-control circuit |
| CN107069424A (en) * | 2017-06-15 | 2017-08-18 | 上海理工大学 | Distributed Feedback Laser drive device that high power low-power consumption is tunable |
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| CN107453200B (en) * | 2017-08-11 | 2020-01-10 | 威创集团股份有限公司 | Output current regulation and control device of laser power supply |
| WO2019128078A1 (en) * | 2017-12-29 | 2019-07-04 | 深圳光峰科技股份有限公司 | Solid-state light source driving device and projection apparatus |
| CN108598858A (en) * | 2018-06-26 | 2018-09-28 | 苏州汉策能源设备有限公司 | Sample gas pond laser light source light intensity automatic control system is scattered before a kind of |
| CN110244798A (en) * | 2019-06-13 | 2019-09-17 | 天津优视眼科技术有限公司 | A kind of adaptive temperature control system of laser indication device |
| WO2023004571A1 (en) * | 2021-07-27 | 2023-02-02 | 宁波佰士瑞医疗科技有限公司 | Laser diode driving power source system |
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