级联长周期光纤光栅对的干涉谱分析及其在多信道滤波器中的应用(英文)  

Analysis of Interference Spectrum of Separated Long-Period Fiber Grating Pairs and Its Applications

作　　者：刘玉敏[1] 俞重远[1] 韩利红[1] 芦鹏飞[1] 徐子欢[1] 

机构地区：[1]北京邮电大学理学院光通信与光波技术教育部重点实验室,北京100876

出　　处：《光子学报》2008年第8期1558-1562,共5页Acta Photonica Sinica

基　　金：the National Basic Research Program of China(2003CB314901);the National High Technology Project of China(2003AA311070);the Open Project of State Key Laboratory on Integrated Optoelectronics

摘　　要：分析了由光纤级联的两个相同的长周期光纤光栅形成的干涉谱。根据设计中的关键技术,利用粒子群优化算法设计了长周期光纤光栅传输损耗为50%的平坦传输损耗谱.将相同的两个优化设计的长周期光纤光栅级联,可以实现一种实用的可调谐多信道隔离滤波器.讨论了级联长周期光纤光栅对之间光纤的偏振特性对干涉谱的影响.The interference transmission spectrum of cascaded long-period fiber gratings, which is inserted a section of standard fiber, is investigated. Based on the design of key aspects, the particle swarm optimization （PSO） algorithm is used to design a flattened broadband transmission spectrum with transmission loss of nearly 50 %. By cascading two such identical long period fiber gratings, a useful tunable multi-channel isolation filter is designed. The influence of polarization of the inserted fiber on the interference spectrum is discussed.

关 键 词：衍射和光栅 全光器件 长周期光栅 滤波器 

分 类 号：TN25[电子电信—物理电子学]