使用紧凑型光子晶体光纤模式间干涉仪和光纤布拉格光栅同时进行应变和温度测量。

Simultaneous strain and temperature measurement using a compact photonic crystal fiber inter-modal interferometer and a fiber Bragg grating.

作者信息

Dong Bo, Hao Jianzhong, Liaw Chin-yi, Lin Bo, Tjin Swee Chuan

机构信息

RF & Optical Department, Institute for Infocomm Research, 138632, Singapore.

出版信息

Appl Opt. 2010 Nov 10;49(32):6232-5. doi: 10.1364/AO.49.006232.

DOI:10.1364/AO.49.006232

PMID:21068853

Abstract

An all-fiber sensor scheme for simultaneous strain and temperature measurement is presented. The sensing head is formed by serially connecting a polarization maintaining photonic-crystal-fiber-based inter-modal interferometer (IMI) with a fiber Bragg grating (FBG). The IMI, exhibiting an opposite strain response as compared to that of the FBG, is highly sensitive to strain, while it is insensitive to temperature. This has potential for improving the strain and temperature measurement resolutions. A sensor resolution of ±8.3 με in strain and ±2 °C in temperature are experimentally achieved within a strain range of 0-957.6 με and a temperature range of 24 °C-64 °C, respectively.

摘要

提出了一种用于同时测量应变和温度的全光纤传感器方案。传感头由一个基于保偏光子晶体光纤的模间干涉仪（IMI）与一个光纤布拉格光栅（FBG）串联连接而成。与FBG相比，IMI表现出相反的应变响应，对应变高度敏感，而对温度不敏感。这对于提高应变和温度测量分辨率具有潜力。在应变范围为0 - 957.6 με和温度范围为24 °C - 64 °C内，实验分别实现了应变分辨率为±8.3 με和温度分辨率为±2 °C。