光散射学报, 2015, 27 (3): 0291, 网络出版: 2016-01-22   

相移光纤光栅多重滤波特性研究及应用

Study on Multiplex Filter Characteristics of Phase-Shifted Fiber Grating and Its Application
作者单位
广西师范大学物理科学与技术学院,桂林 541004
摘要
滤波器是通信中一种重要的器件,相移光纤光栅因其显著的滤波特性,可作为带阻滤波器应用于密集波分复用系统,实现光信号的解调。影响相移光纤光栅滤波特性的因素有很多,通过相移光纤光栅的耦合模理论分析,并利用MATLAB语言编程计算出相移光纤光栅的单波长、双波长和多波长滤波反射谱。结果发现:光栅参数的变化会使相移光纤光栅滤波特性发生改变;当进行双波长滤波时,反射谱将随着相移点位置由内向外的改变而向内塌缩;多波长滤波时,相移点位置不同可分别出现多透射窗口和超宽矩形透射窗口。
Abstract
Filter is a kind of component which is very important in communication,and the notable filter characteristics of phase-shifted fiber grating can be used as a band-stop filter in DWDM system to realize the optical signal demodulation. A lot of factors influence filter characteristics of phase-shifted fiber grating. Through analyzing phase-shifted fiber grating of coupled mode theory,and using MATLAB software to simulate,a single-wavelength,double-wavelength and multi-wavelength reflective spectrum of phase-shifted fiber grating can be get. It is found that different grating parameters will change phase-shifted fiber grating spectrum in different ways; when filtering dual-wavelength,its reflective spectrum will collapse inward with the location change of the phase shift points from the inside out; when filtering multi-wavelength,with different phase shift points location,a multi-transmission-window or a ultra wide rectangular transmission window come out.

王璐玮, 陈越, 赵宜鹏, 吴帅, 秦子雄. 相移光纤光栅多重滤波特性研究及应用[J]. 光散射学报, 2015, 27(3): 0291. WANG Lu-wei, CHEN Yue, ZHAO Yi-peng, WU Shuai, QIN Zi-xiong. Study on Multiplex Filter Characteristics of Phase-Shifted Fiber Grating and Its Application[J]. The Journal of Light Scattering, 2015, 27(3): 0291.

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