外腔半导体激光器在高低温下的机械形变与功率变化  

Mechanical deformation and power change of external cavity semiconductor laser under temperature change

作　　者：李冲 胡翀 姚勇[2] LI Chong;HU Chong;YAO Yong(Shenzhen Neophotonics Optoelectronic Technology Co.,Ltd.,Shenzhen 518057,China;Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China)

机构地区：[1]深圳新飞通光电子技术有限公司,广东深圳518057 [2]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《应用光学》2021年第4期586-591,共6页Journal of Applied Optics

基　　金：新飞通外腔激光器设计——高低温下功率变化改进。

摘　　要：外腔激光器具有窄线宽、低功耗的特征,主要用于相干光通信,实际应用中外腔激光器的输出光功率会在环境温度为高温或者低温时出现下降现象。通过使用有限元商用软件Ansys分析,发现高低温下机械结构会有微小的挠度变化,相较于常温,高低温下最大的挠度角度为0.04°。外腔激光器的腔长较长,结合光路仿真软件Zemax研究发现,微小的挠度变化会引起较大的光路变化,影响耦合效率,进而导致输出光功率降低。通过实验量测证实了光路变化,并基于挠度变化引起功率降低的理论,从设计角度提出了通过缩短腔长、加厚基座的方式来减小输出光功率随环境温度的变化。提出的模型与思路可以为类似产品的功率温度相关性分析提供量化分析思路。The external cavity laser(ECL),which is mainly used for coherent light communication,is characterized by narrow line width and low power consumption.In practical application,the output optical power of ECL will decrease when the ambient temperature is the high or low temperature.Through the use of finite element commercial software Ansys,it was found that the mechanical structure had the slight deflection change at high or low temperatures.Compared with the room temperature,the maximum deflection angle at high or low temperatures was 0.04°.The cavity length of ECL was long,combined with the optical path simulation software Zemax,the slight deflection change would cause the big change of optical path,affect the coupling efficiency and then lead to the reduction of output optical power.The change of optical path was confirmed by the experimental measurement,and based on the theory of power reduction caused by the deflection change,the methods of shortening the cavity length and thickening the base were proposed to reduce the variation of output optical power with the ambient temperature from the point of design.The proposed model and ideas can provide quantitative analysis ideas for the correlation analysis of power and temperature of similar products.

关 键 词：外腔激光器 挠度变化 光路 功率变化 

分 类 号：TN248[电子电信—物理电子学]