A Miniature Fiber Tip Polystyrene Microsphere Temperature Sensor With High Sensitivity  

作　　者：Haibin CHEN Tianchong XIE Jiashuang FENG Xiongxing ZHANG Wei WANG Yanping LI Zilong GUO 

机构地区：[1]School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China [2]Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology,Xi'an Technological University,Xian 710021,China

出　　处：《Photonic Sensors》2022年第1期84-90,共7页光子传感器（英文版）

基　　金：This research was partially funded by Natural Science Basic Research Project of Shaanxi Province,China(Grant No.2020JM-560);Key Scientific Research Plan of Education Department of Shaanxi Province,China(Grant No.20JY028);the National Natural Science Foundation of China(Grant No.61704134).

摘　　要：A fiber-optic temperature sensor based on fiber tip polystyrene microsphere is proposed.The sensor structure can be formed simply by placing and fixing a polystyrene microsphere on the center of an optical fiber tip.Since polystyrene has a much larger thermal expansivity,the structure can be used for high-sensitive temperature measurement.By the illuminating of the sensor with a broadband light source and through the optical Fabry-Perot interference between the front and back surfaces of the polystyrene microsphere,the optical phase difference(OPD)or wavelength shift can be used for the extraction of temperature.Temperature measurement experiment shows that,using a fiber probe polystyrene microsphere temperature sensor with a spherical diameter of about 91.7 pm,a high OPD-temperature sensitivity of about-0.61796nm/℃and a good linearity of 0.9916 were achieved in a temperature range of 20℃-70℃.

关 键 词：Polystyrene microsphere fiber-optic sensor Fabry-Perot interference temperature measurement 

分 类 号：TN20[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]