分布式反馈激光器温度监测系统设计  

Design of temperature monitoring system of distributed feedback laser

作　　者：曹晓冬[1] 王晗 王肇颖[2] 张嘉昕 张建军[1] Cao Xiaodong;Wang Han;Wang Zhaoying;Zhang Jiaxin;Zhang Jianjun(Tianjin Optical Electrical Co.,Ltd,Tianjin 300221,China;School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津光电通信技术有限公司,天津300221 [2]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《电子测量技术》2020年第1期7-11,共5页Electronic Measurement Technology

基　　金：国家自然科学基金(61275084);天津市自然科学基金(18JCYBJC16800)资助。

摘　　要：为了保持分布式反馈激光器(DFB)工作时温度的恒定,提高输出激光的功率稳定度与波长稳定度,提出了一种模糊比例积分微分(PID)算法与遗传算法结合的温度处理优化算法,并根据DFB激光器内部温度传感器的非线性特性,设计了具有线性化处理功能的温度采集电路;采用正/反相功率放大电路,设计了半导体制冷器(TEC)双向驱动电路,实现了DFB激光器温度信息的采集、处理以及反馈调节的闭环监测系统。经MATLAB软件仿真,优化后的PID算法经15 ms到达设定温度值,最大波动幅度约为1.1,波动次数为1次;经系统测试,采用优化后的PID算法作为温度处理算法能够将DFB激光器工作时温度波动范围限制在±0.5℃之间并且使其输出激光的功率稳定度和波长稳定度分别达到了±0.1 mW和±0.5 nm。In order to keep the temperature of distributed feedback(DFB) laser constant and improving the power stability and wavelength stability of the output laser. In this paper, a temperature information processing algorithm has been proposed that is combine the fuzzy proportional integral differential(PID) algorithm and genetic algorithm. Then, according to the nonlinear characteristics of temperature sensor inside DFB laser, a temperature collection circuit has been designed which has a function of linearization processing. So, the closed-loop monitoring system has been realized, which the information of DFB laser can be collection, processing and feedback regulation. The simulation of MATLAB software are shown that the optimized PID algorithm reaches the set temperature value after 15 ms, and the maximum fluctuation amplitude is about 1.1, and the fluctuation frequency is 1. The results of system test are shown that using the optimized PID algorithm as the temperature treatment algorithm, the temperature fluctuation range of the DFB laser at work can be limited between-0.5 ℃ and 0.5 ℃, the stability of the output laser power reaches ±0.1 mW, and the wavelength stability reaches ±0.5 nm.

关 键 词：PID温度控制 功率稳定度 波长稳定度 线性化处理 

分 类 号：TN79[电子电信—电路与系统]