摘要
通过倏逝波耦合分光原理,制作了一种由微光纤搭建的大小为800μm×200μm的小型马赫泽德干涉仪.传感臂的微光纤表面镀有对氢气敏感的金属钯,长度为200μm.通过优化传感器的耦合,使干涉波形的消光系数达到15 dB,从而实现探测波长的大范围可调.
Based on the evanescent wave coupling technique,a Mach-Zehnder interferometer(MZI)with the size of 800μm×200μm was constituted by using two micro-nanofibers.The sensing arm was coated with palladium which is sensitive to the hydrogen,with a length of 200μm.By optimizing the coupling lengths of the interferometers via precise micro-manipulating,the extinction ratio of an interferential wave can be up to 15 dB,and thus a large-dynamic optical sensing range is achieved.
出处
《上海理工大学学报》
CAS
北大核心
2016年第6期535-539,共5页
Journal of University of Shanghai For Science and Technology
关键词
干涉仪
微光纤
氢气传感
interferometer
micro-nanofiber
hydrogen sensing
