低成本半导体激光器2级高稳定温控系统研制  

Development of low cost two-stage high stability temperature control system for semiconductor laser

作　　者：孙磊 宫廷 郭古青 田亚莉 孙小聪 周月婷 邱选兵[1,2,3] 李传亮[1,2,3] SUN Lei;GONG Ting;GUO Guqing;TIAN Yali;SUN Xiaocong;ZHOU Yueting;QIU Xuanbing;LI Chuanliang(School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Center of Technology Innovation for Light Manipulations and Applications,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Engineering Research Center of Precision Measurement and Online Detection Equipment,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学应用科学学院,太原030024 [2]太原科技大学山西省精密测量与在线检测装备工程研究中心,太原030024 [3]太原科技大学山西省光场调控与融合应用技术创新中心,太原030024

出　　处：《激光技术》2025年第2期239-244,共6页Laser Technology

基　　金：国家重点研发计划资助项目(2023YFF0718100);国家自然科学基金资助项目(52076145;12304403);山西省科技创新人才团队专项基金资助项目(202304051001034);山西省留学人员科技活动项目(20230031);山西省省筹资金资助回国留学人员科研资助项目(2023-151)。

摘　　要：为了解决半导体激光器温度漂移导致输出波长偏移的问题,提出了一种双闭环分布式反馈(DFB)激光器2级温控系统。在激光器自身内部温控系统的基础上,引入了外部环境温度的环路控制系统,确保激光器能够处于稳定的工作温度范围内;以嵌入式处理器为主控制器,采用数字比例-积分-微分控制算法,结合脉冲宽度调制技术和低成本H桥芯片控制热电制冷器的加热和制冷,实现激光器温度的精确控制;环境温度不变的条件下改变激光器的控制温度,以及激光器的工作温度不变的条件下改变环境温度,并进行了温度稳定性实验。结果表明,该系统的温控精度可高达±0.03℃;以近红外DFB激光器进行波长稳定性实验时,连续120 min内,激光器波长变化的最大误差为0.0036 nm;电流保持不变的情况下,激光器输出波长与温度的相关系数高于0.9996。该温控系统具备高精度、低成本和紧凑体积的特点,在分子光谱、气体检测、光纤通信等领域具有一定的应用前景。In order to solve the problem of semiconductor laser wavelength drift leading to output wavelength deviation,a dual-loop distributed feedback(DFB)laser two-stage temperature control system was proposed.Based on the internal temperature control system of the semiconductor laser,an external environmental temperature loop control system was introduced to ensure that the laser can operate within a stable temperature range.With an embedded processor as the main controller,a digital proportional-integral-derivative control algorithm was adopted.Combined with pulse width modulation and low-cost H-bridge chips to control the heating and cooling of thermoelectric coolers(TEC),precise control of the laser two-stage temperature was achieved.Temperature stability experiments were carried out by changing the control temperature of the laser while keeping the environmental temperature constant and changing the environmental temperature while keeping the laser operating temperature constant.The results indicate that the temperature control precision of this system can reach up to±0.03℃.Wavelength stability experiments were conducted with a near-infrared DFB laser,and the results showe that the maximum wavelength error of the laser in 120 min is 0.0036 nm.Under constant current conditions,the correlation coefficient between laser output wavelength and temperature is higher than 0.9996.The temperature control system has the characteristics of high precision,low cost and compact size,and has certain application prospects in molecular spectroscopy,gas detection,fiber optics communication,and other fields.

关 键 词：激光技术 温度控制 比例-积分-微分算法 2级系统 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学] TP273[自动化与计算机技术—检测技术与自动化装置]