光子学报, 2020, 49 (8): 0806004, 网络出版: 2020-11-27
基于马赫曾德尔干涉原理的优化双锥结构应变温度同步传感
A DOT Structure Based on Mach-Zehnder Interference Principle for Simultaneous Strain and Temperature Sensing
光纤传感器 MZI干涉仪 优化双凹锥 应变 温度 Optical fiber sensor MZI interferometer Dual optimized down-taper Strain Temperature
摘要
设计了一种基于光纤马赫曾德尔干涉仪的优化双凹锥结构。该结构通过单模光纤和保偏光纤之间使用不充分的电弧放电熔接制作而成,可以实现应变和温度的同步测量.凹锥中部的球形纤芯可以进一步地调控包层和纤芯中的光能量分布,经优化几何参数后的结构可以获得16 dB的干涉条纹消光比,大于相同参数下的双凹锥结构。传感实验表明所提出的结构在0~244.35 με和25~50℃的范围内分别具有±1.616 με和±0.79℃的高分辨率。由于交叉敏感导致两个参数的测量误差均小于1×10-3%.这种结构为同时测量应变和温度提供了一种有效的方法,可应用于精密仪器测量中.
Abstract
In this paper, a dual optimized down taper structure based on fiber Mach-Zehnder interferometer is designed. This structure is manufactured by using insufficient arc discharge splicing between single-mode fiber and polarization-maintaining fiber method, achieving simultaneous measurement of strain and temperature. The spherical core which located at the middle of the down taper can further regulate the light power distribution in the core and cladding area. The optimized structure can obtain a larger interference fringe extinction ratio of 16 dB, which is greater than the dual-down taper structure under the same parameters. Sensing experiments show that the proposed structure has high resolutions of ±1.616 με and ±0.79℃ in the range of 0~244.35 με and 25~50℃, respectively. The measurement error of both parameters is less than 1×10-3% due to cross-sensitivity. This structure provides a promising method for simultaneous measurement of strain and temperature, which can be applied to precision instrument measurement.
韩晓鹏, 柳春郁, 赵纯龙, 苏杭, 杨九如. 基于马赫曾德尔干涉原理的优化双锥结构应变温度同步传感[J]. 光子学报, 2020, 49(8): 0806004. Xiao-peng HAN, Chun-yu LIU, Chun-long ZHAO, Hang SU, Jiu-ru YANG. A DOT Structure Based on Mach-Zehnder Interference Principle for Simultaneous Strain and Temperature Sensing[J]. ACTA PHOTONICA SINICA, 2020, 49(8): 0806004.