微纳光纤改善光束质量的研究  

Improvement of the Beam Quality Factor by Using Tapered Micro/Nano Fiber

作　　者：何华龙[1] 冯国英[1] 邓国亮[1] 周昊[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《中国激光》2011年第8期179-183,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(60890200);NSAF基金(10976017)资助课题

摘　　要：采用时域有限差分法(FDTD),在微米量级下,模拟了微纳光纤对于光束质量的改善情况。实验中所使用的微纳光纤是采用火焰熔融拉锥法,将单模光纤熔融拉锥制成的,并采用CCD测量光束质量因子M2,对比测量了光束通过普通单模光纤和熔锥微纳光纤的光束质量。实验结果显示,与普通单模光纤相比,熔锥微纳光纤可以改善光束质量。实验与FDTD模拟计算得到的结果相一致。The finite difference time domain method （FDTD） was used to research the influence of the micro/nano fiber on the beam quality. The micro/nano fibers were made by using fused-tapered technique. And using CCD, we have measured the beam propagation factors M2 of beams passing through the tapered micro/nano fiber and the single mode fiber, respectively. The experimental results indicated that, compared to the beam propagation factor M2 of beam propagating along the single mode fiber, M2 of beam propagating along the tapered micro/nano fiber is better. The experimental results are consistent with the FDTD calculation results.

关 键 词：光纤光学 时域有限差分法 微纳光纤 光束质量因子M2 

分 类 号：TN253[电子电信—物理电子学]