大模场啁啾光纤光栅的光谱特性(英文)  

Spectral characteristics of chirped fiber Bragg gratings inlarge-mode-area fibers

作　　者：赵保银[1,2] 段开椋[1] 赵卫[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,瞬态光学与光子技术国家重点实验室,西安710119 [2]中国科学院研究生院,北京100049

出　　处：《强激光与粒子束》2011年第7期1794-1798,共5页High Power Laser and Particle Beams

基　　金：Supported by the Chinese Academy of Sciences(2006LH02);National Key Natural Science Foundation of China(60537060)

摘　　要：将一种矩阵算法拓展应用于数值求解多模耦合模微分方程,并使用该矩阵算法对大模场啁啾光纤光栅的光谱特性进行了理论研究。结果表明,大模场多模光纤光栅因模式的自耦合和互耦合而使反射谱存在多个反射峰,这与单模光纤光栅的反射谱不同。由于光栅周期存在啁啾,大模场光纤光栅的反射峰分裂,且峰值反射率减小。使用高斯切趾函数可使反射峰分裂在一定程度上得到改善。A matrix method is extended to solve the multi mode coupling differential equations ,and there- by the spectral characteristics of the chirped Bragg gratings in large-mode-area fibers （LMA FBGs） are studied theoretically .Unlike those of Bragg gratings in single mode optical fibers （SMFBGs） ,the reflection spectra of chirped LMA FBGs contain self-coupling and co-coupling peaks of the existing modes .For the chirped LMA FBGs ,the reflectivity decreases and the reflection peaks split .These splits can be i mproved on some degree by Gaussian apodization function.

关 键 词：矩阵方法 大模场啁啾光纤光栅 耦合模理论 切趾函数 

分 类 号：TN253[电子电信—物理电子学]