Research on SFTS structure based optical fiber sensor

作     者：TONG Zheng-rong SUN Li-li QIN Juan ZHANG Wei-hua 童峥嵘;孙立立;秦娟;张卫华

作者机构：Tianjin Key Laboratory of Film Electronic and Communication Devices School of Electrical and Electronic Engineering Tianjin University of Technology 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2019年第15卷第1期

页      面：39-42页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 

基　　金：supported by the Tianjin Natural Science Foundation(No.17JCYBJC16600) the Opened Fund of the State Key Laboratory on Integrated Optoelectronics(No.IOSKL2015KF06) the National Natural Science Foundation for Youth(No.11704283) 

主　　题：RIU In Research on SFTS structure based optical fiber sensor TCF 

摘      要：A single-mode-few-mode-thin-core-single-mode(SFTS) structure based optical fiber sensor is fabricated and experimentally studied. The sensing principle relies on the inter-modal interference. Since the core diameter of few-mode fiber(FMF) is larger than that of single-mode fiber(SMF), the FMF helps to allow more light to enter the cladding of thin-core fiber(TCF), which helps TCF to excite cladding modes. The interference between core and cladding modes in TCF occurs at the joint of lead-out SMF and TCF. Experimental results demonstrate a refractive index(RI) sensitivity of-103.34 nm/RIU and a temperature sensitivity of 0.05 nm/℃. The proposed sensor not only can measure temperature, but also can measure RI. In addition, the proposed sensor is simple for without complicated fabrication process.