旋转光纤圆起偏器的特性分析  

Characteristics Analysis of Spun Fiber Circular Polarizer

作　　者：吴明华[1] 孟义朝[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200072

出　　处：《光子学报》2011年第2期178-185,共8页Acta Photonica Sinica

基　　金：上海市重点学科和科委重点实验室项目(No.S30108;No.08DZ2231100)资助

摘　　要：基于旋转光纤耦合模理论,对窄带和宽带旋转光纤圆起偏器的特性进行了计算分析.研究了注入光的偏振态、光纤固有线双折射和旋转速率对窄带圆起偏器最小工作长度的影响,并借助多包层光纤的分析方法,分析了旋转光纤各参量变化对宽带圆起偏器工作带宽的影响.结果表明:窄带圆起偏器的最小工作长度与光纤固有线双折射和光纤旋转速率有关,而与注入光的偏振态无关;改变光纤旋转速率可调节宽带圆起偏器的工作带宽,改变应力区到纤芯的距离可改变宽带圆起偏器的中心波长.Characteristics of narrowband and wideband spun fiber circular polarizer were numerically analyzed based on spun fiber coupled-mode theory.Influence on the minimum operation length of the narrowband circular polarizer by such factors as polarization state of the incident light,intrinsic linear birefringence and spin rate of the spun fiber were studied.By use of multi-cladding fiber analysis method,influence on the operation bandwidth of the wideband circular polarizer by the various parameters of the spun fiber was analyzed also.The results show that the minimum operation length of narrowband circular polarizer is dependent on the inherent linear birefringence and the spin rate of the fiber,and is independent on the polarization state of the incident light.Changing the spin rate can adjust the bandwidth of the wideband circular polarizer,and changing the distance between the fiber core and the stress zone can lead the central wavelength of it to change accordingly.

关 键 词：光纤光学 旋转光纤 耦合模理论 圆起偏器 计算分析 

分 类 号：TN253[电子电信—物理电子学]