基于单模-薄芯-单模光纤结构马赫-曾德尔干涉仪的光纤温度传感器。

Optical fiber temperature sensor based on a Mach-Zehnder interferometer with single-mode-thin-core-single-mode fiber structure.

作者信息

Wang Qingzhuo, Meng Hongyun, Fan Xiaofeng, Zhou Mengqi, Liu Fengxiang, Liu Chunyang, Wei Zhongchao, Wang Faqiang, Tan Chunhua

机构信息

Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.

出版信息

Rev Sci Instrum. 2020 Jan 1;91(1):015006. doi: 10.1063/1.5128485.

DOI:10.1063/1.5128485

PMID:32012606

Abstract

A Mach-Zehnder interferometer for measurement of temperature is proposed and experimentally demonstrated, which consists of two sections of single mode fiber (SMF) and a section of thin core fiber spliced between the two SMFs. The two welding areas are heated and stretched to improve the split and recombination of light. The wavelength of the resonant dip will shift when temperature varies due to the thermo-optic and thermal expansion effect. The experimental results show that a temperature sensitivity of 65 pm/°C with a linear correlation coefficient of 0.996 can be achieved in a temperature range from 25 °C to 80 °C. Due to its ease of manufacture, low cost, and high sensitivity, the fiber optic temperature sensor is suitable for temperature measurement applications.

摘要

提出并通过实验演示了一种用于温度测量的马赫-曾德尔干涉仪，它由两段单模光纤（SMF）和一段熔接在两段单模光纤之间的薄芯光纤组成。对两个熔接区域进行加热和拉伸以改善光的分束和重新组合。由于热光效应和热膨胀效应，当温度变化时，谐振凹陷的波长会发生偏移。实验结果表明，在25℃至80℃的温度范围内，可实现65 pm/℃的温度灵敏度，线性相关系数为0.996。该光纤温度传感器因其易于制造、成本低和灵敏度高，适用于温度测量应用。