基于双通道M-Z干涉仪的FBG光开关研究  

Research of Optical Switch Based on Dual-pass Tunable Mach-Zehnder Interferometer

作　　者：闫光[1,2] 何巍[1,2] 杨润涛[1,2] 祝连庆[1,2] 

机构地区：[1]北京信息科技大学光电信息与仪器北京市工程研究中心,北京100192 [2]北京信息科技大学光电测试技术北京市重点实验室,北京100192

出　　处：《振动．测试与诊断》2016年第4期801-804,817,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：教育部长江学者和创新团队发展计划资助项目(IRT1212);北京市重大科技计划资助项目(Z151100003615010);北京市教育委员会科技计划资助项目(KM201611232005)

摘　　要：为降低电光开光的插入损耗并提高性能,提出了一种基于双通道可调谐马赫-曾德(M-Z)干涉仪制作的光纤布拉格光栅(fiber Bragg grating,简称FBG)光开关,通过改变干涉仪中的可调电动光纤延迟线的延迟时间,实现滤波谱周期的可调谐。通过改变干涉仪其中一臂的延迟时间设定,该光开关能够实现对设定波长光波的开关功能。对光纤M-Z干涉滤波原理进行了理论分析,使用C波段宽带放大自发辐射光源对双通道可调M-Z干涉仪的性能进行了测试。结果表明,其可实现大范围及高精度的滤波调节功能。对基于双通道可调谐马赫-曾德干涉仪制作的FBG光开关,通过FBG开关性能检测系统实验,得到该光开关在波长为1 550nm处的输出光谱,光开关的消光比达到25dB。结果表明,该光开关能够实现大范围高精度滤波功能,具有高消光比、结构简单和易于调节等优点。In order to improve performance and reduce the insertion losses of electro-optic switches,a fiber Bragg grating(FBG)optical switch was designed based on a dual-pass tunable Mach-Zehnder interferometer.The filtering cycle spectrum was tunable by changing the delay time of the electric adjustable fiber delay line in the interferometer.The filter principle of the optical fiber M-Z interferometer was analyzed and tested with the C-band broadband light,and the results show that it can achieve a wide range and high-precision filter adjustment function.The interferometer was also tested as a FBG optical switch.The output spectrum at a wavelength of 1550 nm was obtained through a FBG optical switch performance testing system experiment.Its side mode suppression ratio was over 25 dB.Test results show that it can achieve a large range and fine filter,and that the optical switch also has advantages of a high extinction ratio,simple structure,and easy adjustability.

关 键 词：双通道可调M-Z干涉仪 光纤布拉格光栅 光开关 电动光纤延迟线 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]