大容差光纤耦合技术研究  

Large-tolerance Fiber Coupling Technology

作　　者：袁军行[1,2,3] 孙伟峰[1,2] 陈良益[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]中国科学院研究生院,北京100049 [3]中国电子科技集团公司第38研究所,合肥230031

出　　处：《光子学报》2008年第12期2448-2452,共5页Acta Photonica Sinica

基　　金：国家863高技术研究与发展计划(051Z331BOA)资助

摘　　要：设计了一种新型的耦合系统,该耦合系统由大口径聚焦透镜、1/4节距自聚焦透镜、锥形光纤和球端光纤四部分组成.分析了自聚焦透镜压缩发散角和球端光纤增大数值孔径的机理,给出了计算锥形光纤参量的详细流程.采用大口径透镜和1/4节距自聚焦透镜有效增大径向位置容差和角度容差,然后通过锥形光纤压缩光束半径将激光耦合进球端光纤.仿真实验结果表明,该系统耦合在r<3mm,-1<θ<1.5范围内的耦合效率稳定保持在50%以上.A new type fiber coupling system is designed,which consists of four parts： large aperture lens, 1/ 4 pitch grin lens,taper fiber and step optical fiber with spherical end surface. The principle of compressing with grin lens and enlarging NA with fiber is analysed and the process of calculating the parameters of taper fiber is given. The position and angle tolerance are enlarged by large aperture lens and grin lens and the beam is compressed by taper fiber to match the step optical fiber. The results of simulation experiment shows that its coupling efficiency is above 50% stably with r〈3 mm and -1°〈θ〈1.5°.

关 键 词：光纤耦合 容差 自聚焦透镜 锥形光纤 数值孔径 

分 类 号：TN256[电子电信—物理电子学]