High-sensitivity fiber liquid crystals temperature sensor with tiny size and simple tapered structure  

作　　者：Hai Zhang Jianyu Shang Xiujuan Liu Weimin Sun Feiru Wang Yongjun Liu 张海;尚建宇;刘秀娟;孙伟民;王斐儒;刘永军(Key Laboratory of In-fiber Integrated Optics,Ministry of Education,Harbin Engineering University,Harbin 150001,China;School of Physics and Intelligent Manufacturing,Chifeng University,Chifeng 024000,China;State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]Key Laboratory of In-fiber Integrated Optics,Ministry of Education,Harbin Engineering University,Harbin 150001,China [2]School of Physics and Intelligent Manufacturing,Chifeng University,Chifeng 024000,China [3]State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

出　　处：《Chinese Optics Letters》2020年第10期24-28,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. U1531102 and 61811530061);the Chifeng University Service Economic and Social Development Application Project Foundation of Chifeng;the Fundamental Research Funds for the Central Universities

摘　　要：This Letter presents a new type of optical fiber probe used to detect temperature, whose structure is very simple.The optical fiber probe is filled with cholesteric liquid crystals(CLCs) whose reflected light varies with temperature.The experimental results show that the proposed sensor can achieve a temperature sensitivity of 5.64 nm/°C in the temperature range of 18–40°C. The sensor has the advantages of simple structure, low cost, and easy mass manufacture. Its size is very tiny(the tapered structure, 125 μm in maximum diameter and <300 μm in length) and it is easy to integrate and measure. Meantime, the tapered structure of the probe is also ideal for measuring small samples such as cells and microfluidic channels, which will be a promising candidate for monitoring temperature fluctuations in small spaces.

关 键 词：cholesteric liquid crystal temperature sensor optical fiber 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]