LD圆柱形封装焊后位移的定向热补偿研究  

Study of Post Weld Shift Directional Thermal Compensation in Cylindrical LD Packaging

作　　者：淳静[1] 吴宇列[1] 李圣怡[1] 郑煜 杨海涛[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《光电子．激光》2007年第8期911-914,923,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金重点资助项目(50235040)

摘　　要：针对LD模块的圆柱形激光焊接封装,以LD耦合进尾纤的功率变化为依据,对焊接微变形引起的光纤与LD对准位置偏移进行特征分析。优化减小焊后位移(PWS)的焊接参数,提出PWS方向判定的方法,实现单束激光补焊的定向热补偿,使对准精度提高到0.5μm内,耦合功率恢复到最佳耦合时的90%以上。The characteristics of post-weld-shift（PWS） in laser welding technique for a cylindrical package with fiber pigtail to laser diode have been studied experimentally. The changes of the coupling power are measured for the experimental analysis. The preferred parameters of the laser welding are given to minimize the PWS. The method to judge the driection of the PWS is presented and validated by experiments. The directional thermal compensation by supplemental single-beam laser welding is achieved according to the characteristics analysis of the PWS. The assembly tolerance can be consistently achieved to be less than 0.5 μm,and the coupling power can be increased to better than 90% of the maximum coupling power.

关 键 词：LD 激光焊接封装 焊后位移(PWS) 

分 类 号：TN248.4[电子电信—物理电子学]