大模面积光纤中折射率和掺杂分布的设计和分析

从无源光纤的模场理论和有源光纤的速率方程理论出发,给出了任意折射率分布和掺杂分布光纤的有效模面积和基模提取效率的计算方法,并且通过数值计算对几种典型折射率分布和掺杂分布的光纤性能进行了分析和比较,说明复合折射率光纤与其他传统光纤相比,在百微米量级的大模面积光纤中更具有实用性.

Analysis and Design of Refractive-Index and Dopant Distributions for Large-Mode-Area Fibers

Based on the mode field theory of passive fiber and rate equation of active fiber,the calculative method of effective mode area and extraction efficiency of fundamental mode for large mode area fibers with arbitrary refractive-index profile and dopant distribution of is presented.The performance of various designs for the core refractive-index and dopant distributions of large-mode-area fibers are numerically simulated and compared.The analysis shows that the hybrid profile fiber exhibits better overall performance than other traditional fibers in the design of large-mode-area fibers with core diameter of hundreds of microns.