光纤布拉格光栅
材料科学
灵敏度(控制系统)
光纤传感器
光电子学
磷
光子学
温度测量
微波食品加热
光子晶体光纤
光学
塑料光纤
纤维
电子工程
物理
计算机科学
电信
波长
量子力学
工程类
复合材料
作者
Shiyu Li,Osamah Alsalman,Wassana Naku,Wassana Naku
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2024-07-01
卷期号:24 (13): 20706-20712
标识
DOI:10.1109/jsen.2024.3402128
摘要
This paper reports a highly sensitive fiber Bragg grating (FBG) temperature sensor system based on microwave-photonic interrogation and the enhanced Vernier effect. A low-coherent system-based microwave-photonic three-beam interferometer is constructed using three parallel-arranged FBGs with different Bragg wavelengths and different lead-in fiber lengths. One FBG is used as the sensing device, and the other two are considered as the reference device. Changes in the Bragg wavelength difference between the sensing FBG and the reference FBGs induced by temperature variations are encoded into spectral shifts of the Vernier envelope in the magnitude spectrum of the system in the microwave domain. By carefully designing the Bragg wavelength differences and the lead-in fiber length differences, the enhanced Vernier effect can be realized. A remarkable temperature sensitivity of -40.89 MHz/°C is successfully demonstrated based on the three-FBG sensor system based on the enhanced Vernier effect.
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