一种用于测量高温下基于二氧化硅的光纤布拉格光栅热膨胀和热光系数的红外飞秒激光混合传感器。

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures.

作者信息

Li Litong, Lv Dajuan, Yang Minghong, Xiong Liangming, Luo Jie

机构信息

State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, China.

National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Sensors (Basel). 2018 Jan 26;18(2):359. doi: 10.3390/s18020359.

DOI:10.3390/s18020359

PMID:29373528

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5856160/

Abstract

In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs). The hybrid sensor was composed of an inline fiber Fabry-Perot interferometer (FFPI) cavity and a type-II FBG. Experiment results showed that the type-II FBG had three high reflectivity resonances in the wavelength ranging from 1100 to 1600 nm, showing the peaks in 1.1, 1.3 and 1.5 μm, respectively. The thermal expansion and thermo-optical coefficient (1.3 μm, 1.5 μm) of silica-based FBG, under temperatures ranging from 30 to 1100 °C, had been simultaneously calculated by measuring the wavelength of the type-II FBG and FFPI cavity length.

摘要

在本文中，使用红外飞秒激光制造了一种混合传感器，用于测量基于二氧化硅的光纤布拉格光栅（FBG）的热膨胀系数和热光系数。该混合传感器由一个串联光纤法布里-珀罗干涉仪（FFPI）腔和一个II型FBG组成。实验结果表明，II型FBG在1100至1600 nm波长范围内有三个高反射率共振峰，分别在1.1、1.3和1.5μm处出现峰值。通过测量II型FBG的波长和FFPI腔长度，同时计算了在30至1100°C温度范围内基于二氧化硅的FBG的热膨胀系数和热光系数（1.3μm、1.5μm）。