激光与光电子学进展, 2014, 51 (9): 092801, 网络出版: 2014-08-15   

基于菲涅耳反射的准分布折射率传感器研究 下载: 601次

Fresnel Reflection-Based Optical Fiber Sensor for Quasi-Distributed Refractive Index Measurement
作者单位
中国计量学院光学与电子科技学院, 浙江 杭州 310018
摘要
介绍了一种基于时分复用光纤传感技术的准分布折射率传感器。通过测量光纤端面的菲涅耳反射信号的强度,实现对待测溶液折射率的分布检测。在多个测量点之间采用不同长度的延迟光纤,利用不同传感位置处的菲涅耳反射信号回到测量端的时间差来实现距离可分辨的多点测量。实验结果表明该传感器的测量距离达16 km,测得折射率范围为1.3486~1.4525,对应的灵敏度范围为38.785~305.430 dB/RIU(RIU 为折射率单元)。
Abstract
Fresnel reflection-based optical fiber sensor for quasi-distributed refractive index (RI) detection using the optical time domain reflection technique as an interrogation method is proposed. Ambient RIs at different positions along the long fiber link can be obtained by monitoring the Fresnel reflection signals. The experimental results show that the measurement range can reach 16 km, and the refractive index sensitivity is from 38.785 dB/RIU to 305.430 dB/RIU (RIU means refractive index unit) when the RI is from 1.3486 to 1.4525.
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袁剑英, 赵春, 柳齐亮, 余向东, 王剑锋, 张在宣, 金尚忠. 基于菲涅耳反射的准分布折射率传感器研究[J]. 激光与光电子学进展, 2014, 51(9): 092801. Yuan Jianying, Zhao Chun, Liu Qiliang, Yu Xiangdong, Wang Jianfeng, Zhang Zaixuan, Jin Shangzhong. Fresnel Reflection-Based Optical Fiber Sensor for Quasi-Distributed Refractive Index Measurement[J]. Laser & Optoelectronics Progress, 2014, 51(9): 092801.

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