熔融拉锥技术在光纤耦合传输中的应用  

Fused taper technique for fiber coupling applications

作　　者：彭博[1] 张海涛[1] 闫平[1] 巩马理[1] 

机构地区：[1]清华大学精密仪器与机械学系光子与电子技术研究中心摩擦学国家重点实验室,北京100084

出　　处：《激光技术》2009年第5期470-472,共3页Laser Technology

摘　　要：为了实现光纤激光器和放大器系统中不同参量光纤的低损耦合,采用光纤拉锥方法来实现光纤连接。经过理论分析,在大数值孔径光纤传输到小数值孔径光纤时,采用光纤拉锥技术可以有效地提高传输功率。采用改造的大模光纤熔接机进行拉锥实验研究,精确控制拉锥时间、放电功率、步进量和步进速率可以获得不同的拉锥形状。采用光纤拉锥元件对标准单模光纤和大模场光纤进行耦合实验,得到纤芯内传输的耦合输出效率由之前的50%提高到85%,获得了低损连接效果。结果表明,熔融拉锥技术为不同光纤之间的耦合提供了一种简单实用的方式。In order to reduce coupling loss between different fibers in a fiber laser or amplifier, fused taper technique was applied to couple fibers. Based on theoretical analysis,when the laser signal transmitted from a large numerical aperture （NA） fiber into a small NA fiber, the transmitted power can be improved effectively with fused taper technique. In experiment,largemode fiber fusion splicer was applied to taper fibers. Different tapered fibers can be achieved with precise control of are-discharged time and power, stepped size and velocity. The transmitted efficiency was improved from 50% to 85% with much lower coupling loss for the coupling between a standard single-mode fiber and a large-mode fiber based on fused taper technique. Fused taper technique offers a simple and praetieal method to eouple different fibers.

关 键 词：激光技术 光纤激光器 熔融拉锥技术 耦合效率 

分 类 号：TN248.1[电子电信—物理电子学]