High-sensitivity and fast-response fiber optic temperature sensor using an anti-resonant reflecting optical waveguide mechanism  

作　　者：ZHIBIN LI ZIYE WU ZHUOQI LI LIANGXUN OU WENXIANG ZHANG ZHICONG LAI YU ZHANG MENGYUAN XIE JIEYUAN TANG WENGUO ZHU HUADAN ZHENG YONGCHUN ZHONG XIONG DENG XIHUA ZOU ZHE CHEN JIANHUI YU 

机构地区：[1]Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes,Department of Optoelectronic Engineering,Jinan University,Guangzhou 510632,China [2]Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications,Department of Optoelectronic Engineering,Jinan University,Guangzhou 510632,China [3]Center for Information Photonics and Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China

出　　处：《Photonics Research》2023年第8期1397-1407,共11页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2021YFB2800801);National Natural Science Foundation of China(12174155,12174156,61675092,62105125);Natural Science Foundation of Guangdong Province for Distinguished Young Scholars(2020B1515020024);Key-Area Research and Development Program of Guangdong Province(2019B010138004);Aeronautical Science Foundation of China(201708W4001,201808W4001);Special Project in Key Fields of the Higher Education Institutions of Guangdong Province(2020ZDZX3022);Project of STRPAT of EC Laboratory(ZHD201902)。

摘　　要：Temperature sensing is essential for human health monitoring.High-sensitivity(>1 nm∕℃)fiber sensors always require long interference paths and temperature-sensitive materials,leading to a long sensor and thus slow response(6–14 s).To date,it is still challenging for a fiber optic temperature sensor to have an ultrafast(~ms)response simultaneously with high sensitivity.Here,a side-polished single-mode/hollow/single-mode fiber(SPSHSF)structure is proposed to meet the challenge by using the length-independent sensitivity of an anti-resonant reflecting optical waveguide mechanism.With a polydimethylsiloxane filled sub-nanoliter volume cavity in the SP-SHSF,the SP-SHSF exhibits a high temperature sensitivity of 4.223 nm/℃ with a compact length of 1.6 mm,allowing an ultrafast response(16 ms)and fast recovery time(176 ms).The figure of merit(FOM),defined as the absolute ratio of sensitivity to response time,is proposed to assess the comprehensive performance of the sensor.The FOM of the proposed sensor reaches up to 263.94(nm/℃)∕s,which is more than two to three orders of magnitude higher than those of other temperature fiber optic sensors reported previously.Additionally,a threemonth cycle test shows that the sensor is highly robust,with excellent reversibility and accuracy,allowing it to be incorporated with a wearable face mask for detecting temperature changes during human breathing.The high FOM and high stability of the proposed sensing fiber structure provide an excellent opportunity to develop both ultrafast and highly sensitive fiber optic sensors for wearable respiratory monitoring and contactless in vitro detection.

关 键 词：fiber WAVEGUIDE RESONANT 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]