等效相移光栅反射光谱特性的研究  

Research on Equivalent Phase-shifted Fiber Bragg Grating's Reflection Spectrum Characteristics

作　　者：王晓瑞[1] 谷健[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院电子与信息工程学院,广东深圳518000

出　　处：《光电技术应用》2015年第3期62-66,共5页Electro-Optic Technology Application

基　　金：2015深港ICT青年创业计划资助

摘　　要：等效相移光栅的原理是,通过对取样光纤布拉格光栅在特定点进行毫米尺度的"位移",经过傅里叶变换,在各频率通道产生"等效相移"。首先利用光栅的Turan传输矩阵进行数值模拟,验证了真实相移光栅的各种性质在等效相移光栅中的实现,然后针对当前关于等效相移光栅的报道中,-2级光栅反射率都很低,并且没有出现"等效相移"的情况,提出了一种实现-2级等效相移光栅的方法,并进行了仿真验证。最后给出了等效相移光栅反射率随长度变化的曲线。The principle of equal-phase shifted fiber Bragg grating is that by introducing a spatial shift at certain position of sampling fiber Bragg grating, equivalent phase shift can be achieved in different frequency channel after Fourier transformation. Firstly, the fiber Bragg grating Turan transmission matrix is used to perform number simulation, and all kinds of phase shifted fiber Bragg grating’s properties are verified in equal-phase shifted fiber Bragg grating. Secondly, according to the report that-2 grade fiber Bragg grating has low reflectivity and equal-phase shifted state can’t be realized, a method for realizing-2 grade equal-phase shifting is proposed and relative verification is performed. Finally, the relationship curve of equal-phase shifted fiber Bragg grating reflectivity changing with length is given.

关 键 词：等效相移光栅 传输矩阵 反射率 占空比 -2级 equal-phase-shifted fiber BRAGG GRATING (FBG) 

分 类 号：O433.4[机械工程—光学工程]