LPFG包层模对环境折射率的灵敏度分析  

The Sensitivity Analysis of the Cladding Modes of LPFG on the Ambient Refractive Index

作　　者：王翔[1] 李新碗[1] 陈建平[1] 

机构地区：[1]上海交通大学"区域光纤通信网与新型光通信系统"国家重点实验室,上海200240

出　　处：《光纤与电缆及其应用技术》2009年第2期38-40,共3页Optical Fiber & Electric Cable and Their Applications

基　　金：国家863计划资助项目(2006AA01z242;2007AA01Z275);国家自然科学基金资助项目(ID90704002)

摘　　要：从理论和实验两个方面分析了长周期光纤光栅(LPFG)前3阶包层模的透射谱特性与光栅外包层厚度间的关系。LPFG的谐振波长漂移范围随着其外包层厚度的减小而扩大,同时,高阶耦合模LP04模的谐振波长漂移强于低阶模。研究表明,通过设计光纤光栅结构能改善其各阶包层模谐振峰对环境折射率的灵敏度。The relation between the transmission spectrums of the first three orders of cladding mode and the outer cladding thickness of the LPFG is analyzed theoretically and experimentally. The resonance wavelength shift of LPFG is increased with the reduction of the outer cladding thickness, in the same time, the resonance wavelength shift of higher order coupling mode, LP04 mode, is stronger than that of lower order modes. The research shows certain LPFG structure can improve the sensitivity of the resonance peaks of cladding modes on ambient refractive index.

关 键 词：光纤 光纤光栅 长周期光纤光栅 

分 类 号：TN253[电子电信—物理电子学]