法布里-珀罗干涉仪
激光线宽
光纤布拉格光栅
光学
干涉测量
材料科学
激光器
解调
光纤传感器
分布反馈激光器
波长
光纤
强度(物理)
光纤激光器
环形激光器
温度测量
光电子学
物理
电信
频道(广播)
量子力学
计算机科学
作者
Xianchao Yang,Yuhuai Liu,Xingming Sun,Xiaonan Yang,Jianquan Yao
出处
期刊:IEEE Transactions on Instrumentation and Measurement
[Institute of Electrical and Electronics Engineers]
日期:2021-01-01
卷期号:70: 1-7
被引量:7
标识
DOI:10.1109/tim.2021.3105266
摘要
The strain- and temperature-sensing characteristics of fiber ring laser (FRL) sensors are studied comprehensively. The reflected sensing head, made up of spheroidal Fabry-Perot interferometer (FPI) concatenated with fiber Bragg grating (FBG), is inserted in the cavity of FRL acting as the laser intensity modulator and wavelength selector. The laser intensity is sensitive to temperature change while insensitive to strain, making the dual-parameter demodulation realizable without multivariate matrix by detecting the laser wavelength shift and the laser intensity variation, for the first time in our best knowledge. The comparable sensitivities of 1 pm/ με and 24.9 pm/°C are detected in experiment for strain and temperature, respectively, with low detection limit (DL) of 0.87 με and 0.035 °C, high Q factor of 1140 and 7.07 × 10 5 . The high intensity and narrow linewidth of the sensor make it potentially great for application in long-distance sensing systems.
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