高双折射sagnac环滤波特性的分析.docx

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摘 要
随着光通信及光纤传感技术的迅速发展,光学滤波器已经得广泛的应用,并
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成为重要的光学器件,特别是波分复用和密集波分复用系统中,窄带通滤波器其
是关键器件之一,因此,各种光学滤波器一直是光纤通信乃至光电子领域的一个研究热点。而带有双折射光纤的Sagnac环滤波器,与其他滤波器件相比,具有结构简单、成本低、损耗小、灵活性强、偏振无关、滤波特性稳定且便于调节等优点,在光纤传感解调,可调谐多波长光纤激光器和光纤通信滤波器等领域具有巨大的应用前景,因此已成为近年来的一个关注焦点。
本文基于Jones矩阵基本理论,从理论上推导出了单段高双折射光纤Sagnac 环透射和反射函数的多种表达形式,并通过数值模拟和实验分别研究了基本高双折射Sagnac环中不同元件的参数,如耦合器的耦合系数,偏振控制器的偏转角度,高双折射光纤的长度和拍长,对其滤波特性的影响,以此检验理论的正确性。笔者还在此基础上,利用数值分析方法进一步对高双折射Solc—Sagnac和
Lyot-Sagnac滤波器的滤波特性进行了详细地分析研究,提出了几种性能良好的滤波器设计方案。
关键词:光纤滤波器;高双折射;Jones矩阵;Sagnac干涉仪
Abstract
蚴the fast development of munication and fiber sensor technology, optical filters have e one important ponent and have been widely used in many example,the narrow-band filter is one ponent in the WDM and DWDM ,various optical filters have always been one
hot research area in Optical in ●
filter,which is based on one or more high bircfringence(HiBi)fiber Sagnac loop
mirror,has the advantages such aS simple structure,low insertion lOSS. polarization independence,high flexibility and stable performance,SO it has potential application in the fields of demodulation of fiber sensor,tunable Multiwavelength
fiber laser and fiber filter of munication and attracted widespread
attention.
Based on the Jones Matrix nleory,the various theoretic reflective and transitive functions of the HBF Sagnac filter are order to check the theory, the relation between the frequency response and the parameter of filter such as the couple coe伍cient of the OC。the rotation angles of the length and the beat
length of the HBF is detailed studied through Simulation and then
the characteristies of and loops are theoretically
and numerically analyzed,and designs of filters with good performance are given.
Keywords:fiber filter;high birefringence;Jones Matrix;Sagnac interferometer
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目 录
摘 要 .I
Abstract . .II
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