CN204087018U - A kind of temperature control system of semiconductor laser - Google Patents

A kind of temperature control system of semiconductor laser Download PDF

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Publication number
CN204087018U
CN204087018U CN201420311413.7U CN201420311413U CN204087018U CN 204087018 U CN204087018 U CN 204087018U CN 201420311413 U CN201420311413 U CN 201420311413U CN 204087018 U CN204087018 U CN 204087018U
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China
Prior art keywords
resistance
mosfet pipe
semiconductor
input
chip microcomputer
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Expired - Fee Related
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CN201420311413.7U
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Chinese (zh)
Inventor
葛益娴
王晖
徐政
眭凯强
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Nanjing University of Information Science and Technology
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Nanjing University of Information Science and Technology
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Abstract

The utility model relate to a kind of temperature control system of semiconductor laser, comprise semiconductor laser, temperature sensor, semiconductor cooler, temperature collection circuit, A/D change-over circuit, single-chip microcomputer, liquid crystal display, input through keyboard module and semiconductor refrigerator drive circuit, described semiconductor laser, temperature sensor and semiconductor cooler are packaged together, and are connected with temperature collection circuit, semiconductor refrigerator drive circuit; Described liquid crystal display, input through keyboard module are connected with single-chip microcomputer; One end of described A/D change-over circuit is connected with single-chip microcomputer, the other end is connected with temperature collection circuit; One end of described semiconductor refrigerator drive circuit is connected with single-chip microcomputer, the other end is connected with semiconductor cooler.This system can realize the temperature control system of the semiconductor laser of heating and cooling double-direction control.

Description

A kind of temperature control system of semiconductor laser
Technical field
The utility model relate to domain of control temperature, has particularly related to a kind of temperature control system of semiconductor laser.
Background technology
Semiconductor laser (LD) has that volume is little, lightweight, structure is simple, the life-span is long, conversion efficiency is high, low in energy consumption, cheap, use safety, be easy to the advantages such as adjustment, is commonly used in modern optical fiber telecommunications system.But during semiconductor laser work, its threshold current and power stability are to responsive to temperature.In order to make optical maser wavelength and the stable output power of semiconductor laser, serviceable life extends as far as possible, must carry out high-precision control to its temperature.
At present, domestic many R&D institutions have carried out various trial, attempt to find out a kind of temperature control precise and stable, moderate scheme.All do a lot of research in this regard both at home and abroad, in the accuracy of detection and heating and cooling device of the choosing of temperature element, temperature measurement circuit, make different trials.Control method is by analog pid to digital PID, and by fuzzy control to adaptive control, the mode of operation of semiconductor cooler refrigeration driving circuit, thus improves temperature-controlled precision gradually.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model just there are provided a kind of temperature control system of semiconductor laser, can realize the temperature control system of the semiconductor laser of heating and cooling double-direction control.
To achieve these goals, the technical solution adopted in the utility model is such: a kind of temperature control system of semiconductor laser, comprise semiconductor laser, temperature sensor, semiconductor cooler, temperature collection circuit, A/D change-over circuit, single-chip microcomputer, liquid crystal display, input through keyboard module and semiconductor refrigerator drive circuit, described semiconductor laser, temperature sensor and semiconductor cooler are packaged together, and are connected with temperature collection circuit, semiconductor refrigerator drive circuit, described liquid crystal display, input through keyboard module are connected with single-chip microcomputer, one end of described A/D change-over circuit is connected with single-chip microcomputer, the other end is connected with temperature collection circuit, one end of described semiconductor refrigerator drive circuit is connected with single-chip microcomputer, the other end is connected with semiconductor cooler, described temperature collection circuit is made up of constant-current source circuit and bridge-type metering circuit, its reference voltage source Vcc resistance in series Rs is connected to the inverting input of operational amplifier IC0, the resistance R of one end ground connection is connected to reference voltage source Vcc and its other end is connected with the in-phase input end of operational amplifier IC0 through voltage stabilizing diode, the emitter of described PNP triode Q1 is connected with the inverting input of operational amplifier IC0, base stage is connected with the output terminal of operational amplifier IC0, collector and resistance R1, resistance R3 is connected, described resistance R1 is connected to the in-phase input end of voltage follower IC1 through thermistor R2, described resistance R3 is connected to the inverting input of voltage follower IC1 through resistance R4, the output terminal of this voltage follower IC1 is connected with reverse input end, described resistance R1, output terminal b is provided with between resistance R2, resistance R3, output terminal d is provided with between resistance R4, output terminal b is connected to the in-phase input end of voltage follower IC2, be connected to the in-phase input end of operational amplifier IC4 through resistance R9 after the reverse input end of described voltage follower IC2 is connected with output terminal, in-phase input end ground connection after resistance R10 of this operational amplifier IC4, described output terminal d is connected to the in-phase input end of voltage follower IC3, be connected to the inverting input of operational amplifier IC4 through resistance R8 after the reverse input end of described voltage follower IC3 is connected with output terminal, the output terminal of the operational amplifier IC4 of the described A/D of being connected to change-over circuit is connected with inverting input through resistance Rf, described semiconductor refrigerator drive circuit is by MOSFET pipe Q2, MOSFET pipe Q3, MOSFET pipe Q4, MOSFET pipe Q5 symmetry is formed, and the grid of MOSFET pipe Q2 meets the PWM signal OUT1 of single-chip microcomputer output, source electrode meets Vcc, drain electrode meets diode D11 and Vcc and is connected, and the grid of MOSFET pipe Q3 meets the PWM signal OUT2 of single-chip microcomputer output, source electrode is connected with resistance R0 ground connection, drain electrode connects diode D12 to resistance R0 ground connection, and the grid of MOSFET pipe Q4 meets the PWM signal OUT3 of single-chip microcomputer output, source electrode meets Vcc, drain electrode meets diode D13 and Vcc and is connected, and the grid of MOSFET pipe Q5 meets the PWM signal OUT4 of single-chip microcomputer output, source electrode is connected with resistance R0 ground connection, drain electrode connects diode D14 to resistance R0 ground connection, MOSFET pipe Q2, through resistance R11 in the middle of MOSFET pipe Q3, electric capacity C1, resistance R12, electric capacity C2 series-parallel network connects semiconductor cooler one end, MOSFET pipe Q4, through resistance R13 in the middle of MOSFET pipe Q5, electric capacity C3, resistance R14, electric capacity C4 series-parallel network connects the semiconductor cooler other end, described temperature collection circuit adopts constant current source to be connected with bridge-type metering circuit, described semiconductor refrigerator drive circuit adopts H bridge power bi-directional to drive, the PWM signal that described single-chip microcomputer exports, by inputting through OUT1, OUT2, OUT3, OUT4 tetra-pins the H bridge circuit be made up of four MOSFET pipes, heats or refrigeration to control described semiconductor cooler.
As a kind of preferred version, described single-chip microcomputer is MSP430F149 chip.
As a kind of preferred version, described semiconductor cooler is TEC1--3103 semiconductor cooler, and this refrigerator allows the maximum current passed through to be 3A.
Compared with prior art, the beneficial effects of the utility model:
1. there is simple, practicality, strong interference immunity, feature that measuring accuracy is high;
2. adopt constant current source to combine with bridge-type metering circuit detected temperatures signal, can not only electrical noise be eliminated, and eliminate the non-linear of simple Qiao Shi circuit;
3., through digitial controller process adjustment, the digital control amount of output adopts H bridge power bi-directional to drive by the pwm signal of controlled duty cycle, can control semiconductor cooler heating or refrigeration, when making environment temperature height different, all can realize thermostatic control.
Accompanying drawing explanation
Fig. 1 is system chart of the present utility model;
Fig. 2 is temperature collection circuit schematic diagram of the present utility model;
Fig. 3 is semiconductor refrigerator drive circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment:
As shown in Figure 1, a kind of temperature control system of semiconductor laser, comprise semiconductor laser, temperature sensor, semiconductor cooler, temperature collection circuit, A/D change-over circuit, single-chip microcomputer, liquid crystal display, input through keyboard module and semiconductor refrigerator drive circuit, described semiconductor laser, temperature sensor and semiconductor cooler are packaged together, and are connected with temperature collection circuit, semiconductor refrigerator drive circuit; Described liquid crystal display, input through keyboard module are connected with single-chip microcomputer; One end of described A/D change-over circuit is connected with single-chip microcomputer, the other end is connected with temperature collection circuit; One end of described semiconductor refrigerator drive circuit is connected with single-chip microcomputer, the other end is connected with semiconductor cooler.
As shown in Figure 2, adopt constant current source to combine with bridge-type metering circuit, left side is constant-current source circuit to temperature collection circuit schematic diagram.Adopt thermistor as temperature sensor, in ideal conditions, flowing through NTC (R2) electric current is exactly a constant value, has nothing to do with other parameters.Constant-current source circuit is by reference voltage source LM385, resistance R and resistance R1, resistance R2, resistance R3, resistance R4, and PNP triode 9012 and operational amplifier TLV2252 form, and when wherein R selects different resistance, constant current source has different output.The electric current I 1 of resistance R1, resistance R2 half-bridge is the steady current provided by series connection adjustable constant current source.By using voltage follower, make resistance R1, resistance R2 half-bridge and resistance R3, resistance R4 half-bridge is mutually isolated, and namely electric current I 1 has nothing to do with the electric current I 2 of resistance R3, resistance R4 half-bridge, and the voltage of two half-bridges is equal.During the initial equilibrium conditions of electric bridge.When the resistance of thermistor R2 changes because of temperature change, equilibrium state originally that electric bridge is inclined.With composition two voltage followers, input impedance is high, to ensure the voltage and current not affecting two half-bridges in measuring process.Electric bridge exports as differential pressure, is exported by electric bridge and amplifies.
Semiconductor refrigerator drive circuit schematic diagram as shown in Figure 3, H bridge power bi-directional is adopted to drive, be made up of MOSFET pipe Q2, MOSFET pipe Q3, MOSFET pipe Q4, MOSFET pipe Q5 symmetry, the PWM signal that single-chip microcomputer exports is by inputting through OUT1, OUT2, OUT3, OUT4 tetra-pins, the level of control input end OUT1 ﹑ input end OUT2 ﹑ input end OUT3 ﹑ input end OUT4 just can control sense of current, wherein input end OUT1 is contrary with input end OUT4 level relationship, and input end OUT2 is contrary with input end OUT3 level relationship.Input end OUT1 is high level, input end OUT4 is low level, and input end OUT2 is low level, and input end OUT3 is high level, then MOSFET pipe Q2 Jie Zhi ﹑ MOSFET pipe Q3 Jie Zhi ﹑ MOSFET pipe Q4 Jie Zhi ﹑ MOSFET pipe Q5 ends, and does not have electric current to flow through semiconductor cooler.Set input OUT1 is low level, input end OUT4 is high level, input end OUT2 is low level, input end OUT3 is high level, then MOSFET pipe Q2 Dao Tong ﹑ MOSFET pipe Q5 Dao Tong ﹑ MOSFET pipe Q3 Jie Zhi ﹑ MOSFET pipe Q4 ends, then flow through the direction of current of semiconductor cooler for from left to right.Set input OUT1 is high level, input end OUT4 is low level, input end OUT2 is high level, input end OUT3 is low level, then MOSFET pipe Q2 Jie Zhi ﹑ MOSFET pipe Q5 Jie Zhi ﹑ MOSFET pipe Q3 Dao Tong ﹑ MOSFET pipe Q4 conducting, then flow through the direction of current of semiconductor cooler for from right to left.When the temperature of target object is lower than design temperature, the direction that H bridge heats by semiconductor cooler is with certain amplitude output current; When the temperature of target object is higher than design temperature, the electric current that H bridge can reduce semiconductor cooler even reverses the sense of current of semiconductor cooler to reduce the temperature of target object.When control loop reaches balance, direction of current and the amplitude of semiconductor cooler have just been adjusted, and target object temperature equals design temperature.
One 16 series monolithic MSP430 that the TI company that the utility model mainly adopts releases.That the utility model mainly adopts is single-chip microcomputer MSP430F149 is control core, MSP430F149 single-chip microcomputer has unique advantage in battery powered low-power consumption application, its operating voltage is between 1.8V ~ 3.6V, during normal work, power consumption can be controlled in 200 μ about A, it is primarily of temperature collection circuit collecting temperature signal, through A/D conversion, is converted into digital signal, output pwm signal, drives semiconductor cooler.
Finally it should be noted that, above embodiment is only in order to illustrate the technical solution of the utility model and non-limiting technical scheme, those of ordinary skill in the art is to be understood that, those are modified to the technical solution of the utility model or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present utility model.

Claims (3)

1. the temperature control system of a semiconductor laser, it is characterized in that: described temperature control system comprises semiconductor laser, temperature sensor, semiconductor cooler, temperature collection circuit, A/D change-over circuit, single-chip microcomputer, liquid crystal display, input through keyboard module and semiconductor refrigerator drive circuit, described semiconductor laser, temperature sensor and semiconductor cooler are packaged together, and are connected with temperature collection circuit, semiconductor refrigerator drive circuit, described liquid crystal display, input through keyboard module are connected with single-chip microcomputer, one end of described A/D change-over circuit is connected with single-chip microcomputer, the other end is connected with temperature collection circuit, one end of described semiconductor refrigerator drive circuit is connected with single-chip microcomputer, the other end is connected with semiconductor cooler, described temperature collection circuit is made up of constant-current source circuit and bridge-type metering circuit, its reference voltage source Vcc resistance in series Rs is connected to the inverting input of operational amplifier IC0, the resistance R of one end ground connection is connected to reference voltage source Vcc and its other end is connected with the in-phase input end of operational amplifier IC0 through voltage stabilizing diode, the described inverting input of operational amplifier IC0 is connected with the emitter of PNP triode Q1, and the base stage of PNP triode Q1 is connected with the output terminal of operational amplifier IC0, collector and resistance R1, resistance R3 is connected, described resistance R1 is connected to the in-phase input end of voltage follower IC1 through thermistor R2, described resistance R3 is connected to the inverting input of voltage follower IC1 through resistance R4, the output terminal of this voltage follower IC1 is connected with reverse input end, described resistance R1, output terminal b is provided with between resistance R2, resistance R3, output terminal d is provided with between resistance R4, output terminal b is connected to the in-phase input end of voltage follower IC2, be connected to the in-phase input end of operational amplifier IC4 through resistance R9 after the reverse input end of described voltage follower IC2 is connected with output terminal, in-phase input end ground connection after resistance R10 of this operational amplifier IC4, described output terminal d is connected to the in-phase input end of voltage follower IC3, be connected to the inverting input of operational amplifier IC4 through resistance R8 after the reverse input end of described voltage follower IC3 is connected with output terminal, the output terminal of the operational amplifier IC4 of the described A/D of being connected to change-over circuit is connected with inverting input through resistance Rf, described semiconductor refrigerator drive circuit is by MOSFET pipe Q2, MOSFET pipe Q3, MOSFET pipe Q4, MOSFET pipe Q5 symmetry is formed, and the grid of MOSFET pipe Q2 meets the PWM signal OUT1 of single-chip microcomputer output, source electrode meets Vcc, drain electrode meets diode D11 and Vcc and is connected, and the grid of MOSFET pipe Q3 meets the PWM signal OUT2 of single-chip microcomputer output, source electrode is connected with resistance R0 ground connection, drain electrode connects diode D12 to resistance R0 ground connection, and the grid of MOSFET pipe Q4 meets the PWM signal OUT3 of single-chip microcomputer output, source electrode meets Vcc, drain electrode meets diode D13 and Vcc and is connected, and the grid of MOSFET pipe Q5 meets the PWM signal OUT4 of single-chip microcomputer output, source electrode is connected with resistance R0 ground connection, drain electrode connects diode D14 to resistance R0 ground connection, MOSFET pipe Q2, through resistance R11 in the middle of MOSFET pipe Q3, electric capacity C1, resistance R12, electric capacity C2 series-parallel network connects semiconductor cooler one end, MOSFET pipe Q4, through resistance R13 in the middle of MOSFET pipe Q5, electric capacity C3, resistance R14, electric capacity C4 series-parallel network connects the semiconductor cooler other end.
2. the temperature control system of a kind of semiconductor laser according to claim 1, is characterized in that: described single-chip microcomputer is MSP430F149 chip.
3. the temperature control system of a kind of semiconductor laser according to claim 1, is characterized in that: described semiconductor cooler is TEC1--3103 semiconductor cooler, and this refrigerator allows the maximum current passed through to be 3A.
CN201420311413.7U 2014-06-12 2014-06-12 A kind of temperature control system of semiconductor laser Expired - Fee Related CN204087018U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223982A (en) * 2015-04-06 2016-01-06 安徽问天量子科技股份有限公司 The accurate attemperating unit of ultrared single-photon detector
CN105223977A (en) * 2015-09-15 2016-01-06 盐城工学院 A kind of semiconductor laser temperature control device based on fuzzy control and control method
CN106160064A (en) * 2015-12-02 2016-11-23 马迎建 Based on battery powered portable optical fiber source driving means
CN106200706A (en) * 2015-04-30 2016-12-07 佛山市顺德区美的电热电器制造有限公司 The control device of semiconductor chilling plate
CN109733718A (en) * 2018-12-25 2019-05-10 盐城汇金科技信息咨询服务有限公司 A kind of multifunctional intellectual storage box and article storage method
CN110609393A (en) * 2019-09-23 2019-12-24 山西傲维光视光电科技有限公司 Laser light source system for balancing service life of laser and eliminating speckles for cinema
CN112859966A (en) * 2019-11-27 2021-05-28 华中科技大学 Integrated closed-loop feedback PWM control system and method for optical device parameter locking

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223982A (en) * 2015-04-06 2016-01-06 安徽问天量子科技股份有限公司 The accurate attemperating unit of ultrared single-photon detector
CN106200706A (en) * 2015-04-30 2016-12-07 佛山市顺德区美的电热电器制造有限公司 The control device of semiconductor chilling plate
CN105223977A (en) * 2015-09-15 2016-01-06 盐城工学院 A kind of semiconductor laser temperature control device based on fuzzy control and control method
CN105223977B (en) * 2015-09-15 2017-09-26 盐城工学院 A kind of control method of the semiconductor laser temperature control device based on fuzzy control
CN106160064A (en) * 2015-12-02 2016-11-23 马迎建 Based on battery powered portable optical fiber source driving means
CN109733718A (en) * 2018-12-25 2019-05-10 盐城汇金科技信息咨询服务有限公司 A kind of multifunctional intellectual storage box and article storage method
CN110609393A (en) * 2019-09-23 2019-12-24 山西傲维光视光电科技有限公司 Laser light source system for balancing service life of laser and eliminating speckles for cinema
CN112859966A (en) * 2019-11-27 2021-05-28 华中科技大学 Integrated closed-loop feedback PWM control system and method for optical device parameter locking

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