GU Jin-yu, WANG Guan-jun, AN Yong-quan, LIU Xing-lin, ZHANG Mei-qin
（School of Information and Communication Engineering, North University of China， Taiyuan 030051, China）
Abstract： In order to detect the refractive index of liquid with high precision, based on modular interference, Mach-Zehnder optical fiber refractive rate sensor was studied. Sensor structure is composed of ordinary single-mode fiber and multimode fiber, according to the singlemode multimode singlemode sequence to fuse together, and the fused optical fiber is used to process the taper. As a result, the diameter of the sensing head is about 10 μm. Experimental results show that, as liquid refractive index increases range from 1.33 to 1.35, the loss peak of the transmission spectrum will shift to long wave direction.
Key words： optical fiber fusion; optical fiber tapering; Mach-Zehnder interference; refractive index measurement; optical fiber sensor
CLD number： TN253Document code： A
Article ID： 1674-8042（2016）02-0106-04 doi： 10.3969/j.issn.1674-8042.2016.02.002
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基于光纤马赫泽德干涉的折射率测量
谷瑾瑜， 王冠军， 安永泉， 刘星麟， 张美芹
（中北大学 信息与通信工程学院， 山西 太原 030051）
摘要： 为了高精度的检测液体折射率， 本文研究了基于模间干涉的马赫泽德光纤折射率传感器。 传感器由普通的单模光纤和多模光纤组成， 按照单模， 多模， 单模依次熔接在一起， 并将熔接后的光纤进行拉锥处理， 最终得到直径为10 μm左右的传感头。 实验结果表明， 液体折射率在1.33到1.35范围内增大时， 其透射谱的损耗峰将向长波方向移动。
关键词： 光纤熔接； 光纤拉锥； 马赫泽德干涉； 折射率测量； 光纤传感
引用格式：GU Jin-yu, WANG Guan-jun, AN Yong-quan, et al. Measurement of refrative index based on fiber Mach-Zehnder interference. Journal of Measurement Science and Instrumentation, 2016, 7(2)： 106-109. ［doi： 10.3969／j.issn.1674-8042.2016.02.002］
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