CN104345750B - A kind of semiconductor laser constant current driving and temperature control system - Google Patents
A kind of semiconductor laser constant current driving and temperature control system Download PDFInfo
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- CN104345750B CN104345750B CN201310313855.5A CN201310313855A CN104345750B CN 104345750 B CN104345750 B CN 104345750B CN 201310313855 A CN201310313855 A CN 201310313855A CN 104345750 B CN104345750 B CN 104345750B
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Abstract
A kind of semiconductor laser constant current driving and temperature control system, it is by synchronous buck converter（U1）, constant-current drive circuit（U2）, three terminal regulator（U3）, single-chip microcomputer（U4）, current regulating circuit（U5）, temperature sensing circuit（U6）, synchronous buck converter（U7）, pwm power drive circuit（U8）, TEC（U9）Deng composition.Synchronous buck circuit, constant-current drive circuit provide stable, reliable, strong antijamming capability constant-current source for semiconductor laser；Current regulating circuit is connected with single-chip microcomputer, to drive semiconductor laser.Temperature sensor detects the operating temperature of semiconductor laser, and single-chip microcomputer controls TEC according to operating temperature.The present invention can provide a kind of adjustable quasi-continuous semiconductor laser drive power, while can also be heated or be freezed according to the semiconductor laser operating temperature of monitoring, noise spectra of semiconductor lasers, extend semiconductor laser service life.
Description
Technical field
The present invention relates to constant current driving and temperature control, more particularly to a kind of semiconductor laser constant current driving and temperature control system
System.
Background technology
Semiconductor laser is current-injecting semiconductor PN light emitting devices, has small volume, in light weight, direct tune
It is system, wide bandwidth, high conversion efficiency, highly reliable and the features such as be easily integrated, it is widely used.Because semiconductor laser is a kind of
High power density and the device with high quantum efficiency, it is poor for the ability to bear of surge, the small change of electric current
The very big change and the change of device parameters that luminous power output will be caused, these changes directly jeopardize the safe handling of device, because
And the performance to driving power and safeguard protection have very high requirement in actual applications.Still further aspect, semiconductor laser
Device is power consumption type active device, and the temperature in the course of work can have a significant effect to its output characteristics, and temperature is too high to lead
Induced semiconductor laser ageing even damages, it is therefore desirable to the operating temperature for being adapted to temperature control in laser, such ability
Make laser output power stable, extend the service life of laser.
At present, the constant current driving of noise spectra of semiconductor lasers and temperature control also much need to solve the problems, such as.It is for example permanent
The current precision of stream driving output, slow turn-on；It is not high etc. to the monitoring accuracy of temperature in temperature controlled processes.
The content of the invention
The present invention is directed to technical deficiency existing for existing product, and the one kind developed is applied to semiconductor laser constant current
Driving and temperature control system.The system provides a kind of adjustable quasi-continuous semiconductor laser drive power, while can also be according to prison
The semiconductor laser operating temperature of survey, noise spectra of semiconductor lasers are heated or freezed, and are extended semiconductor laser and are used the longevity
Life.
The technology used in the present invention means are as follows：
A kind of semiconductor laser constant current driving and temperature control system, it is characterized in that including synchronous buck converter U17, constant current
Drive circuit U2, three terminal regulator U3, single-chip microcomputer U4, current regulating circuit U5, temperature sensing circuit U6, synchronous buck converter
U7, pwm power drive circuit U8, TEC U9, the annexation of its various pieces are：
Described constant-current drive circuit U2, three terminal regulator U3, current regulating circuit U5, temperature sensing circuit U6, PWM work(
Rate drive circuit U8 is connected with single-chip microcomputer U4, and described pwm power drive circuit U8 is connected with synchronous buck converter U7, institute
The constant-current drive circuit U2 stated is connected with synchronous buck converter U17, described temperature sensing circuit U6 and TEC U9
It is connected with semiconductor laser.
Annexation is as follows inside described constant-current drive circuit U2：
PWM_LD signals enter operational amplifier U1A in-phase end by second resistance R2, and operational amplifier U1A's is anti-phase
End is connected with output end；Operational amplifier U1A output termination 3rd resistor R3,3rd resistor the R3 other end and operation amplifier
Device U1B in-phase end and the 7th resistance R7 node c are connected, operational amplifier U1B end of oppisite phase and the 8th resistance R8 and the 5th
Resistance R5 node a is connected, the 8th resistance R8 other end ground connection；Operational amplifier U1B output end is with the 4th resistance R4's
One end connects, the 4th resistance R4 other end connection NMOS Q1 grid；NMOS Q1 drain electrode meets synchronous buck converter U17
Output end, NMOS Q1 source electrode are connected with the 6th resistance R6 and the 5th resistance R5 node b；The 6th resistance R6 other end with
7th resistance R7 and the 3rd electric capacity C3, diode D1 negative poles, the 9th resistance R9 are connected with the cathode node d of laser diode；The
The three electric capacity C3 other end, diode D1 positive poles, the 9th resistance R9 other end and laser diode negative pole ground connection.
Described pwm power drive circuit（U8）Internal annexation is as follows：
Pwm power drive circuit U8 AVDD ends and PVDD terminations 5V；AGND ends and PGND ends ground connection；HIZ terminations the 23rd
Resistance R23 and single-chip microcomputer U4 32 pin, the 23rd resistance R23 other ends ground connection；FAULT1 ends pin connects the 24th resistance R24 and single-chip microcomputer
U4 2 pin, another termination 5V of the 24th resistance R24；FAULT0 terminates the 26th resistance R26 and single-chip microcomputer U4 3 pin, the 26th resistance
Another termination 5V of R26；IN+ ends, IN- ends and SHUTDOWM ends are connected with single-chip microcomputer U4 29 pin, 28 pin and 27 pin respectively；
The 4th inductance L4 of OUT+ terminations one end, the 4th inductance L4 the electric capacity C17 of another termination the 17th and TEC U9 node, the
17 electric capacity C17 other end ground connection；OUT- terminates the 5th inductance L5 one end, the 5th inductance L5 electric capacity C19 of another termination the 19th
With TEC U9 node, the 19th electric capacity C19 other end is grounded.
The operational amplifier chip of described constant-current drive circuit is LM2904.
Described pwm power drive circuit U8 H bridges driving chip is DRV592.
Described single-chip microcomputer is STM8S105K4.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the pwm power driver circuit schematic diagram of the present invention；
Fig. 3 is the driver circuit schematic diagram of the present invention；
Fig. 4 is the single chip circuit schematic diagram of the present invention.
Fig. 5 is three terminal regulator, current regulating circuit and the temperature sensing circuit schematic diagram of the present invention.
Embodiment
Principle of the invention block diagram as shown in figure 1, its by including synchronous buck converter U17, constant-current drive circuit U2, three ends
Voltage-stablizer U3, single-chip microcomputer U4, current regulating circuit U5, temperature sensing circuit U6, synchronous buck converter U7, pwm power driving
Circuit U 8, TEC U9 etc. are formed.
After adding 12V DC voltage by external interface, 5V DC voltages are exported by three terminal regulator, single-chip microcomputer is opened
Beginning work, internal processes bring into operation.First, internal processes detection current regulating circuit U5 input value, according to different defeated
Enter value, program exports the PWM ripples of different duty, for adjusting the driving current of semiconductor laser.Detection temperature passes simultaneously
Inductive circuit U6 value of feedback, according to the differences of value of feedback, the PWM ripples of different duty are exported and give pwm power drive circuit U8,
Through control TEC U9 refrigeration or heating after overdriving.
Principle of the invention figure is as shown in Fig. 2,3,4,5.
In fig. 2, PWM_LD signals enter operational amplifier U1A in-phase end, operational amplifier by second resistance R2
U1A end of oppisite phase is connected with output end, operational amplifier U1A composition voltage followers；Operational amplifier U1A output termination the
Three resistance R3,3rd resistor the R3 other end are connected with the node c of operational amplifier U1B in-phase end and the 7th resistance R7, fortune
The end of oppisite phase for calculating amplifier U1B is connected with the 8th resistance R8 and the 5th resistance R5 node a, the 8th resistance R8 another termination
Ground, operational amplifier U1B form a differential amplifier circuit；Operational amplifier U1B output end and the 4th resistance R4 one end
Connection, the 4th resistance R4 other end connection NMOS Q1 grid；NMOS Q1 drain electrode connects synchronous buck converter U17 outputs
End, NMOS Q1 source electrode are connected with the 6th resistance R6 and the 5th resistance R5 node b, and NMOS Q1 compositions expand current circuit；6th
The resistance R6 other end and the 7th resistance R7 and the 3rd electric capacity C3, diode D1 negative poles, the 9th resistance R9 and laser diode
Cathode node d is connected；The 3rd electric capacity C3 other end, diode D1 positive poles, the 9th resistance R9 other end and laser diode
Negative pole ground connection.
In figure 3, pwm power driver U3 AVDD ends and PVDD terminations 5V；AGND ends and PGND ends ground connection；HIZ ends
Connect the 23rd resistance R23 and single-chip microcomputer U4 32 pin, the 23rd resistance R23 other ends ground connection；FAULT1 ends pin connect the 24th resistance R24 with
Single-chip microcomputer U4 2 pin, another termination 5V of the 24th resistance R24；FAULT0 the 26th resistance R26 of termination and single-chip microcomputer U4 3 pin, the 26th
Another termination 5V of resistance R26；IN+ ends, IN- ends and SHUTDOWM ends are connected with single-chip microcomputer U4 29 pin, 28 pin and 27 pin respectively
Connect；OUT+ terminates the 4th inductance L4 one end, the 4th inductance L4 the electric capacity C17 of another termination the 17th and TEC U9 section
Point, the 17th electric capacity C17 other end ground connection；OUT- terminates the 5th inductance L5 one end, the 5th inductance L5 electricity of another termination the 19th
Hold C19 and TEC U9 node, the 19th electric capacity C19 other end ground connection.
In figures 4 and 5, control cores of the single-chip microcomputer U4 as system, its PWM_LD end connection constant-current drive circuit U2；
PWM_IN+, PWM_IN-, FAULT1, FAULT0, HI_Z and SHUTDOWN end are connected to pwm power drive circuit U8；SW interfaces
For one-chip machine simulation debugging interface；AD_TEC ends are connected to be connected with the 12nd resistance R12 and the 13rd resistance R13 node,
12nd resistance R12 another termination 5V, the 13rd resistance R13 another termination GND, this partial circuit are used for measuring partly leading
The temperature of body laser；AD_PTR ends are connected to variable resistor R15 centre tap, variable resistor R15）One termination 5V, separately
One end is grounded, and this partial circuit is used for adjusting the size of semiconductor laser drive current.Three terminal regulator U5 exports 5V voltages,
Working power is provided for single-chip microcomputer.
Test indicate that the present invention has, circuit is simple, stable performance, output current precision are high, temperature control is accurate etc.
Feature.
Claims (1)
1. a kind of semiconductor laser constant current driving and temperature control system, it is characterized in that being driven including synchronous buck converter U17, constant current
Dynamic circuit U 2, three terminal regulator U3, single-chip microcomputer U4, current regulating circuit U5, temperature sensing circuit U6, synchronous buck converter
U7, pwm power drive circuit U8, TEC U9, the annexation of its various pieces are：
Described constant-current drive circuit U2, three terminal regulator U3, current regulating circuit U5, temperature sensing circuit U6, pwm power drive
Dynamic circuit U 8 is all connected with single-chip microcomputer U4, and described pwm power drive circuit U8 is connected with synchronous buck converter U7, described
Constant-current drive circuit U2 is connected with synchronous buck converter U17, described temperature sensing circuit U6 and TEC U9 and half
Conductor laser is connected；
Annexation is as follows inside described constant-current drive circuit U2：
PWM_LD signals by second resistance R2 enter operational amplifier U1A in-phase end, operational amplifier U1A end of oppisite phase with
Output end is connected；Operational amplifier U1A output termination 3rd resistor R3,3rd resistor the R3 other end and operational amplifier
U1B in-phase end and the 7th resistance R7 node c are connected, operational amplifier U1B end of oppisite phase and the 8th resistance R8 and the 5th electricity
Resistance R5 node a is connected, the 8th resistance R8 other end ground connection；Operational amplifier U1B output end and the one of the 4th resistance R4
End connection, the 4th resistance R4 other end connection NMOS Q1 grid；It is defeated that NMOS Q1 drain electrode meets synchronous buck converter U17
Go out end, NMOS Q1 source electrode is connected with the 6th resistance R6 and the 5th resistance R5 node b；The 6th resistance R6 other end and
Seven resistance R7 and the 3rd electric capacity C3, diode D1 negative poles, the 9th resistance R9 are connected with the cathode node d of laser diode；3rd
The electric capacity C3 other end, diode D1 positive poles, the negative pole ground connection of the 9th resistance R9 other end and laser diode；
Annexation is as follows inside described pwm power drive circuit U8：
Pwm power drive circuit U8 AVDD ends and PVDD terminations 5V；AGND ends and PGND ends ground connection；HIZ terminates the 23rd resistance
R23 and single-chip microcomputer U4 32 pin, the 23rd resistance R23 other ends ground connection；FAULT1 ends pin connects the 24th resistance R24 and single-chip microcomputer U4's
2 pin, another termination 5V of the 24th resistance R24；FAULT0 terminates the 26th resistance R26 and single-chip microcomputer U4 3 pin, and the 26th resistance R26 is another
One termination 5V；IN+ ends, IN- ends and SHUTDOWM ends are connected with single-chip microcomputer U4 29 pin, 28 pin and 27 pin respectively； OUT+
Terminate the 4th inductance L4 one end, the 4th inductance L4 the electric capacity C17 of another termination the 17th and TEC U9 node, the 17th electricity
Hold C17 other end ground connection；OUT- terminates the 5th inductance L5 one end, the 5th inductance L5 the electric capacity C19 of another termination the 19th and heat
Electric refrigerator U9 node, the 19th electric capacity C19 other end ground connection；Described constant-current drive circuit U2 operational amplifier chip
For LM2904；Described pwm power drive circuit U8 H bridges driving chip is DRV592；Described single-chip microcomputer U4 is
STM8S105K4；
When single-chip microcomputer U4 starts working, internal processes bring into operation, and first, internal processes detection current regulating circuit U5's is defeated
Enter value, according to different input values, program exports the PWM ripples of different duty, for adjusting the driving of semiconductor laser electricity
Stream, while detection temperature sensing circuit U6 value of feedback, according to the difference of value of feedback, by the PWM ripples of different duty export to
Pwm power drive circuit U8, through control TEC U9 refrigeration or heating after overdriving.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313855.5A CN104345750B (en) | 2013-07-25 | 2013-07-25 | A kind of semiconductor laser constant current driving and temperature control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313855.5A CN104345750B (en) | 2013-07-25 | 2013-07-25 | A kind of semiconductor laser constant current driving and temperature control system |
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| Publication Number | Publication Date |
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| CN104345750A CN104345750A (en) | 2015-02-11 |
| CN104345750B true CN104345750B (en) | 2017-12-19 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462031B (en) * | 2015-05-06 | 2021-01-08 | 武汉博激世纪科技有限公司 | Semiconductor laser adjustable constant current drive circuit based on NTC type resistance |
| CN106129790B (en) * | 2016-09-05 | 2019-06-07 | 吉林大学 | A kind of digital laser pumping source |
| CN106451065B (en) * | 2016-10-09 | 2023-07-04 | 北京杏林睿光科技有限公司 | Semiconductor laser constant current driving system |
| CN106406386B (en) * | 2016-12-26 | 2018-09-11 | 武汉博激世纪科技有限公司 | A kind of two-way TEC automatic, high precisions temperature-control circuit |
| CN112803237B (en) * | 2021-04-08 | 2021-07-30 | 安菲腾(常州)光电科技有限公司 | High-efficiency wide-working-voltage semiconductor laser constant-current driving circuit |
| CN113056042A (en) * | 2021-04-21 | 2021-06-29 | 北京航天控制仪器研究所 | Closed-loop control optical fiber heating device |
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| JP2005057537A (en) * | 2003-08-05 | 2005-03-03 | Sumitomo Electric Ind Ltd | Temperature control circuit for light emitting device |
| CN102447218A (en) * | 2011-11-23 | 2012-05-09 | 武汉长盈通光电技术有限公司 | Laser constant-current control drive circuit |
| CN102801104A (en) * | 2012-08-09 | 2012-11-28 | 武汉博激世纪科技有限公司 | System for realizing bidirectional temperature control on laser based on full-bridge controller |
| 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 |
| CN203338172U (en) * | 2013-07-25 | 2013-12-11 | 长春工业大学 | Semiconductor laser constant current drive and temperature control system |
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| US6584128B2 (en) * | 2001-01-05 | 2003-06-24 | Scientific-Atlanta, Inc. | Thermoelectric cooler driver utilizing unipolar pulse width modulated synchronous rectifiers |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005057537A (en) * | 2003-08-05 | 2005-03-03 | Sumitomo Electric Ind Ltd | Temperature control circuit for light emitting device |
| CN102447218A (en) * | 2011-11-23 | 2012-05-09 | 武汉长盈通光电技术有限公司 | Laser constant-current control drive circuit |
| CN102801104A (en) * | 2012-08-09 | 2012-11-28 | 武汉博激世纪科技有限公司 | System for realizing bidirectional temperature control on laser based on full-bridge controller |
| 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 |
| CN203338172U (en) * | 2013-07-25 | 2013-12-11 | 长春工业大学 | Semiconductor laser constant current drive and temperature control system |
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Inventor after: Wang Lijuan Inventor after: Xie Qiang Inventor after: Wang Baijin Inventor after: Gao Zeguang Inventor before: Wang Lijuan Inventor before: Wang Baijin Inventor before: Gao Zeguang |
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Granted publication date: 20171219 Termination date: 20190725 |