基于超结构长周期光纤光栅的OCDMA编解码器  

OCDMA codec based on superstructured long-period fiber grating

作　　者：燕萌[1] 姚敏玉[1] 张洪明[1] 

机构地区：[1]清华大学电子工程系集成光电子学国家重点实验室,北京100084

出　　处：《光通信研究》2008年第2期18-20,63,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(60477021)

摘　　要：文章在分析长周期光纤光栅的透射特性的基础上,提出超结构长周期光栅(SSLPG)具有与超结构布拉格光栅(SSFBG)的反射谱相似的交叉透射谱,并提出利用色散补偿光纤(DCF)中基模和内包层模之间的模式耦合可制作基于SSLPG的光码分多址(OCDMA)时域扩展相位编码器。仿真表明,用SSLPG和SSFBG能获得相同的编解码效果。On the basis of the analysis of cross-transmission characteristics of the Long-Period fiber Grating （LPG）, we find that superstructured LPG has a cross-transmission spectrum similar to the reflection spectrum of SuperStructured Fiber Bragg Grating （SSFBG）. By utilizing the coupling between the fundamental mode and the inner cladding mode coexisting in the Dispersion Compensating Fiber （DCF）, superstructured LPG-based encoder/decoder for time-spread phase-coded OCDMA system can be realized. Simulation results show that identical encoding/decoding performance can be achieved with superstructured LPG. and superstructured FBG,

关 键 词：光通信 光码分多址 超结构长周期光纤光栅 时域扩展相住编码 

分 类 号：TN76[电子电信—电路与系统]