Fast-Response Fiber-Optic FPI Temperature Sensing System Based on Modulated Grating Y-Branch Tunable Laser  

作　　者：Yang CHEUNG Zhenguo JING Qiang LIU Ang LI Yueying LIU Yihang GUO Sen ZHANG Dapeng ZHOU Wei PENG 

机构地区：[1]School of Physics,Dalian University of Technology,Dalian 116024,China [2]School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian 116024,China [3]School of Computer and Electronic Information/School of Artificial Intelligence,Nanjing Normal University,Nanjing 210023,China

出　　处：《Photonic Sensors》2024年第1期59-72,共14页光子传感器（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.62271101);the Fundamental Research Funds for Central Universities(Grant No.DUT21ZD212).

摘　　要：In this paper,a cost-effective and miniaturized instrument is proposed,which is based on a tunable modulated grating Y-branch(MG-Y)laser for rapid temperature measurement using a Fabry-Perot interferometer(FPI)sensor.The FPI sensor with a 1463-μm cavity length is a short segment of a capillary tube sandwiched by two sections of single-mode fibers(SMFs).This system has a broad tunable range(1527 nm-1567 nm)with a wavelength interval of 8 pm and a tuning rate of 100 Hz.Temperature sensing experiments are carried out to investigate the performance of the system by demodulating the absolute cavity length of the FPI sensor using a cross-correlation algorithm.Experimental results show that the sensor can reach the response time as short as 94 ms with the sensitivity of 802 pm/C.Benefiting from the homemade and integrated essential electrical circuits,the entire system has the small size,low cost,and practical application potential to be used in the harsh environment for rapid temperature measurement.

关 键 词：MG-Y laser INTERROGATOR rapid temperature measurement cross-correlation algorithm 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]