中国激光, 2014, 41 (9): 0905006, 网络出版: 2014-06-30   

基于多芯少模光纤位移传感器的研究

Study of Displacement Sensor Based on Few-Mode Multi-Core Fiber
作者单位
天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室 微光机电系统技术教育部重点实验室, 天津 300072
摘要
提出一种基于新型多芯少模光纤模式干涉原理的位移传感器,该传感器由两段单模光纤和一段多芯少模光纤组成。研究了该传感器的实现原理,并实验验证。实验结果表明当光纤轴向被拉伸0~60 μm时,该新型传感器的检测灵敏度为-61.17 pm/μm,与理论计算结果之间的误差小于3.9%。因此,当使用高分辨率光谱仪作为接收器时,该传感器可检测17 nm的位移变化。
Abstract
A new type displacement sensor based on few-mode multi-core fiber is presented. The sensor consists of two segments of single mode fiber and a segment of few-mode multi-core fiber. The sensing principle of the sensor is investigated and the experiments are performed to verify its feasibility. The experimental results show that the sensitivity of this sensor is -61.17 pm/μm with the elongation from 0 to 60 μm, error between the experimental results and the theoretical calculation is less than 3.9%. So the minimum change of displacement detected is 17 nm by using an optical spectrum analyzer (OSA) with high resolution.
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张玉龙, 贾大功, 李帅, 吉喆, 张红霞, 刘铁根, 张以谟. 基于多芯少模光纤位移传感器的研究[J]. 中国激光, 2014, 41(9): 0905006. Zhang Yulong, Jia Dagong, Li Shuai, Ji Zhe, Zhang Hongxia, Liu Tiegen, Zhang Yimo. Study of Displacement Sensor Based on Few-Mode Multi-Core Fiber[J]. Chinese Journal of Lasers, 2014, 41(9): 0905006.

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