大功率半导体激光器驱动电源及温控系统设计

大功率半导体激光器驱动电源及温控系统设计
张龙1，陈建生1,2，高静1,2，檀慧明1，武晓东1
(1.中国科学院苏州生物医学工程技术研究所江苏省医用光学重点实验室，江苏苏州215163；
2.苏州国科医疗科技发展有限公司，江苏苏州215163)
摘
要:为了解决大功率半导体激光器的输出波长和功率的稳定性问题，设计了一套大功率激光器
恒流驱动电源及温控系统。

利用深度负反馈电路实现对激光器驱动电流的恒流控制，采用硬件比例-积分(Proportional⁃Integral ，PI)温控电路结合恒流驱动，控制半导体制冷器(Thermoelectric Cooler ，TEC)的工作电流，实现激光器工作温度的精确控制。

所设计的驱动电源可实现输出电流0~12.5A 连续可调，同时具有电流检测、过流保护、晶体管-晶体管逻辑(Transistor⁃Transistor Logic ，TTL)信号调制等功能。

所设计的温控系统的控制精度可达到±0.05℃，同时设定温度连续可调，温度可实时监测。

实验结果表明该设计能够保证稳定的电流输出和温度控制，满足大功率激光器的使用要求。

关键词:半导体激光器；恒流驱动电源；温控系统中图分类号:TN248.4
文献标志码:A
DOI :10.3788/IRLA201847.1005003
Design of driving power and temperature control system for high
power semiconductor laser
Zhang Long 1,Chen Jiansheng 1,2,Gao Jing 1,2,Tan Huiming 1,Wu Xiaodong 1
(1.Jiangsu Key Laboratory of Medical Optics,Suzhou Institute of Biomedical Engineering and Technology,
Chinese Academy of Sciences,Suzhou 215263,China;
2.Suzhou Guoke Medical Science &Technology Development Co.,Ltd.,Suzhou 215163,China)
Abstract:In order to solve the output wavelength and power stability of high power semiconductor laser,high power semiconductor laser constant current driver and temperature control system were designed.Deep negative feedback circuit was used to control the laser drive current,the analog Proportional⁃Integral (PI)circuit and constant current driver were adopted to control the working current of Thermoelectric Cooler (TEC),the laser working temperature can be kept accurately.The design can realize the linear adjustment of output current from 0-12.5A,and has the function of current detection,over⁃current protection and Transistor⁃Transistor Logic (TTL)modulation.The control precision of the temperature control system can achieve ±0.05℃.Temperature can be adjusted continuously and can be monitored in real time.Experiment results show that the design can guarantee the output current and temperature control stably,which satisfies the requirement of high power semiconductor laser.Key words:semiconductor laser;
constant current driver;temperature control system
收稿日期:2018-05-11;修订日期:2018-06-10基金项目:(BE2016090,BE2016005-2);(2016YFB0402202)
作者简介:(1987-),,,。

Email:zhanglong@ 导师简介:(1968-),,,,,。

Email:wuxd@
第47卷第10期红外与激光工程
2018年10月
Infrared and Laser Engineering
0引言
、、
,、、
,,
,。

,、
[1-3],
,
,
[4-5]。

ILX Lightwave、Analog Technologies Inc、Wavelength、Thorlabs、Martek Laser、Lumina Power ,。

,
、、
、,
J-CW5025
,,
0~25A,,,。

,,
,,。

1系统总体设计
1,
、。

、、、
、、-(Transistor-Transistor Logic,TTL)、。

、-(Proportional-Integral,PI)、(Thermoelectric Cooler,TEC)。

STM32,
、、TEC。

1
Fig.1Overall design of system
2恒流驱动系统设计
2,
:、、、、、TTL、、。

2.1模拟信号输入
,D/A
,,。

MAX4544,。

MAX45441Laser-On,45 ,;Laser-On,6
5,。

2.2信号调理
,,
,R7R11, AD822,R8、R9
RP2,Vset。

2.3恒流单元
,
[6-8]。

Vset
,
Vset/RB4,RB4。

2
Fig.2Schematic of the laser constant current driver circuit
U9B AD822,Vset U9B
,RB4,
U9B。

Vset
,,,
,NPN QB2 PNP QB3,QB22N5551,QB3 2N5401。

QB1 ,,。

IRF3205,
8mΩ,55V,
110A。

Vdc1,
Agilent6684A,0~40V,0~ 128A,5000W,。

,
,。

,,
2Vset/RB4。

,。

RB4
,,
,
,,
MOS
,。

2.4电流检测
,Rs,R1、R3、R4、R5
,Rs
, R2、U1B RP1
,,A/D
,,。

2.5限流保护
,
[9]。

R19、RP3、R12、U2B D2,RP3,U2B
Up,
Up,Up,
Up,,
Up,。

2.6TTL信号输入
, TTL。

TTL
,。

TTL,Sig
,Sig,Q4
,Q4,R22,Q2
,Q2,R21,Q1
,Q1,R8,;Sig ,Q4,Q4,R22
,Q2,Q2,R21
,Q1,Q1,R8
,。

TTL,
,J7TTL,D3 4。

TTL,Sig。

,Q5,D3,D34 ,R22,Q2,Q2
,R21,Q1,Q1 ,R8,;
,Q5,D3,D34
,R22,Q2,Q2 ,R21,Q1,Q1
,R8,。

2.7软件保护
,。

U10A。

U10A
,
,U10A,Q3,
,Protect,
TTL
,。

2.8假负载
,,
,
,
DSEI60-12A,
1200V,
52A,,。

,。

J5,,。

3温控系统设计
,
,。

3。

、PI、TEC,。

3.1温度测量
(Negative Temperature Coefficient,NTC),RT1
,,
RP7U11B, U11B、Q7R66。

I=V c/ R66。

RT1,
U11A U12B,。

AD-I AD-T,,。

3.2温度设置及PI控制
PI[10],V tset
,V tout。

RP5,U21A V t。

, R53R52R42
R3310,R53R52
,R42
R34、R37。

V tout V tset 、V t :
V tout-V tset R 42=V tsett-V t
R 34+R 37
(1)
:
V tout=V tset
·(R 42+R 34+R 37)-V t ·R 42R 34+R 37(2)
,R 42=10k Ω,R 34=20k Ω,R 37=10k Ω,:
V tout=34V tset-13
V t
(3)
V RT ,R 60=R 66=10k Ω
,R 55R 56,V RT V tout :
12-V RT-V c-6R 51=6-V tout R 41
(4),R 51=R 41=10k Ω,:
V RT=V tout-V c (5)
(1)(2):V RT=34V tset-13
V t-V c
(6):V t V c ,,V t=3.5V ,
V c=2.3V ,V tset 3.5~5.5V ,V RT 1.2~3.87V 。

V c=2.3V ,R 66=10k Ω,I =2.3V/10k Ω=0.23mA 。

5.22~1
6.83k Ω,R 25℃10k Ω,B 3950,,14~40℃。

PI ,,P ;I ,I 。

PI ,TEC V TEC 。

3.3TEC 驱动
PI
V TEC ,MOS QC1。

J9TEC ,3Fig.3Schematic diagram of temperature control circuit
TEC TEC1-12706U, 6.0A,
15.4V,51.4W,
40mm×40mm×40mm×3.8mm。

TEC
Vdc2,RS-100-15 ,15V、7A。

U21B、QC1 RC1,
TEC,。

4实验结果
4。

、。

(a)(b)
(a)Dummy load(b)Constant current drive module
and temperature control module
4
Fig.4Pictures of the system
4.1恒流源实验结果
DA=0.1V,
,V set=2.5mV,10mΩ,
0.25A,,
0.5A。

Tektronix A622。

DA1。

1,
0.15A,
,2.5mV0.5A ,STM32
12DA,DA 2.5V,
2.5/4096=0.6mV,
,。

DA、
,。

表1设定电压和测量电流
Tab.1Setting
voltage and measured current
1,
,5。

Y=A+BX,A=-0.0147,B=5.07115,
0.9999。

:。

5
Fig.5Linear fitting of setting voltage and current
4.2温控实验结果
:26℃,1℃,15~25℃。

5min,5。

Settting
voltage/V
Settting
current/A
00
0.10.5
Measured
current/A
0.00
0.49
Settting
voltage/V
Settting
current/A
Measured
current/A
1.3 6.5 6.60
1.47.07.09
0.2 1.0 1.02 1.57.57.62
0.3 1.5 1.51 1.68.08.12
0.4 2.0 2.00 1.78.58.65
0.5 2.5 2.50 1.89.09.14
0.6 3.0 3.03 1.99.59.63
0.7 3.5 3.52 2.010.010.13
0.8 4.0 4.02 2.110.510.62
0.9 4.5 4.51 2.211.011.12
1.0 5.0 5.04
2.311.511.65
1.1 5.5 5.57
2.412.012.14
1.2 6.0 6.07
2.512.512.64
Settting temperature/℃
Measured temperature 1/℃1514.971615.99Measured temperature 2/℃14.9816.01Measured temperature 3/℃Measured temperature 4/℃14.9515.0216.0216.04Measured temperature 5/℃
15.0115.98Average temperature/℃
Maximum difference/℃14.99-0.0516.010.041716.9717.0216.9817.0117.0417.000.041817.9818.0218.0317.9618.0518.010.051919.0318.9719.0118.9819.0319.000.032019.9819.9720.0120.0220.0020.00-0.032120.9720.9821.0221.0320.9821.000.032222.0221.9721.9822.0322.0122.000.032322.9723.0123.0322.9522.9822.99-0.052423.9524.0124.0323.9824.0524.000.0525
25.02
25.00
24.98
25.02
24.95
24.99
-0.05
表2设定温度与测量温度
Tab.2Setting temperature and measured temperature
2,±0.05℃,。

5结论。

,,;,,、、TTL ,0~12.5A ,±0.05℃。

:,,。

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