锥形光纤结构形态对量子点光纤放大器性能的影响  

Effect of tapered fiber structure on the performance of quantum dot fiber amplifier

作　　者：苏采芸 董艳华[1] 赵阳阳 SU Caiyun;DONG Yanhua;ZHAO Yangyang(Key laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200444

出　　处：《光通信技术》2021年第10期24-29,共6页Optical Communication Technology

基　　金：国家自然科学基金(61705126、61205172)资助。

摘　　要：锥形光纤的结构形态对优化锥形光纤放大器光学性能具有重要意义。分析了不同结构形态锥形光纤的渐逝波透射深度的变化,提出了2种锥形结构的优化方案,并结合速率方程、功率方程及有限差分波束传输法建立了量子点锥形光纤放大器模型,研究了锥形光纤结构形态对放大器性能的影响。仿真结果表明:改变初始熔融长度和拉伸长度可使入射角在满足全反射条件下更接近临界角,从而增加锥区表面的渐逝波深度,优化后的锥形光纤结构形态有利于光纤放大器性能的提升。The structure of tapered fiber is of great significance to optimize the optical performance of tapered fiber amplifier.The variation of evanescent wave transmission depth of tapered fiber with different structure forms is analyzed,and two optimization schemes of tapered fiber structure are proposed.Combined with rate equation,power equation and finite difference beam transmission method,the model of quantum dot tapered fiber amplifier is established,and the influence of tapered fiber structure form on the performance of the amplifier is studied.The simulation results show that changing the initial melting length and stretching length can make the incident angle closer to the critical angle under the condition of total reflection,so as to increase the evanescent wave depth on the surface of the cone.The optimized tapered fiber structure is conducive to the improvement of the performance of the fiber amplifier.

关 键 词：锥形光纤 渐逝波 量子点光纤放大器 光学特性 PbS纳米材料 

分 类 号：TN914[电子电信—通信与信息系统]