力学写制多个π相移长周期光纤光栅的光学特性研究  

Investigation on transmission spectra of mechanically-induced multiple π-phase-shifted LPFG

作　　者：邹俊[1] 周晓军[1,2] 石胜辉[1] 张旨遥[1,2] 刘永[1,2] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054 [2]电子科技大学薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《光电子．激光》2011年第10期1492-1494,共3页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60736038;60925019);教育部新世纪优秀人才支持计划资助项目(NCET-07-0152)教育部新教师基金资助项目(200806141102);四川省青年科技基金资助项目(08ZQ026-012)

摘　　要：利用两个相同且交替放置的周期性相移锯齿槽对单模光纤(SMF)施力,形成了基于机械微弯力学效应的多个π相移长周期光纤光栅(π-PS-LPFG)。实验研究了压力和π相移个数对光栅光谱的影响。结果表明,在1420～1440nm、1475～1500nm和1536～15709nm的波长范围内相移光栅光谱分别呈现出带通特性,阻带出现在通带两侧;相移光栅光谱的凹谷深度由压力确定,LP12模的最大损耗峰值可达-30dB;两损耗峰间的间距取决于π相移个数。本文方法操作简单,容易控制,使π-PS-LPFG的制作更加灵活。The mechanically-induced phase-shifted long period fiber grating （P^LPFG） is formed by pressing a single mode fiber from double sides with two identical periodically phase-shifted grooved plates. The influence of pressure applied on the fiber and the number N of theπ phase-shifts on the transmission spectrum of the PS-LPFG is investigated experimentally. The results show that the depth of the notch of the PS-LPFG can be determined by adjusting the pressure,and a peak transmission loss of --30 dB for LP12 mode has been achieved. And the separation between the two loss-peaks depends on the number N of the π phase-shifts. The proposed method is simple and easy to control, which makes the fabrication of PS-LPFGs more flexible.

关 键 词：纤维光学 相移长周期光纤光栅(PSLPFG) 力学微弯 周期性压力 

分 类 号：O436[机械工程—光学工程]