半导体激光器双闭环温度控制系统  

Double Closed-Loop Temperature Control System for Semiconductor Laser

作　　者：辛文辉[1] 方林 樊建鑫 任卓勇 李仕春[1] 乐静[1] XIN Wen-hui;FANG Lin;FAN Jian-xin;REN Zhuo-yong;LI Shi-chun;YUE Jing(School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《测控技术》2022年第9期31-36,49,共7页Measurement & Control Technology

基　　金：国家自然科学基金面上项目(61875162);陕西省教育厅科学研究计划重点研究项目(20JY048);陕西省自然科学基础研究计划(面上项目)(2020JM-445)。

摘　　要：为了提高半导体激光器输出波长的稳定性,研制了一套双闭环温度控制系统。其中,外环温控以集成化模块MTD1020T为核心,通过优化数字式PID参数,最大可驱动20 W的热电制冷器(TEC),可实现±0.5℃的温控精度;内环温控以控制芯片LTC1923为核心,通过增加差分放大环节及设置PI环节,可实现±0.01℃的温控精度。实验结果表明,双闭环温控系统可将外环快速、大功率温控与内环高精度温控相结合,能够在20 s内实现±10℃的温度调节,4 h内其温控准确度控制在±0.02℃内。该温控系统具有可控范围宽、响应迅速、集成度高等优点,可应用于飞行器气体浓度探测等便携式气体探测领域。In order to improve the stability of semiconductor laser output wavelength, a double closed-loop temperature control system is developed.Among them, the outer ring temperature control takes the integrated module MTD1020 T as the core.By optimizing the digital PID parameters, it can drive up to 20 W thermo electric cooler(TEC) and realize the temperature control accuracy of ±0.5 ℃.The inner loop temperature control takes the control chip LTC1923 as the core.By adding differential amplification link and setting PI link, the temperature control accuracy of ±0.01 ℃ can be realized.The experimental results show that the double closed-loop temperature control system can combine the fast and high-power temperature control of the outer ring with the high-precision temperature control of the inner ring, realize the temperature regulation of ±10 ℃ within 20 s, and control the temperature control accuracy within ±0.02 ℃ within 4 h.The temperature control system has the advantages of wide controllable range, rapid response and high integration.It can be applied to portable gas detection fields such as aircraft gas concentration detection.

关 键 词：半导体激光器 温度控制 PID 闭环 控制精度 

分 类 号：TN21[电子电信—物理电子学]