Intensity detecting refractive index sensors with long-period fiber gratings written in STS structure

作     者：Zuliang Ruan Li Pei Jingjing Zheng Jianshuai Wang Liangying Wu Tigang Ning Ji Wang 阮祖亮;裴丽;郑晶晶;王建帅;吴良英;宁提纲;王吉

作者机构：Institute of Lightwave TechnologyBeijing Jiaotong UniversityBeijing 100044China Key Laboratory of All Optical Network and Advanced Telecommunication Network of Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2019年第17卷第7期

页      面：12-16页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 61827817 and 61525501) 

主　　题：long-period fiber gratings written index intensity detecting sensor 

摘      要：A refractive index intensity detecting sensor with long-period grating written in the single-mode–thin-core–single-mode fiber(STS) structure is proposed and optimized *** sensor is composed of two single-mode fibers connected by a section of long-period fiber grating fabricated on thin-core *** optimization and benefitting from the phase matching point, the loss peak of the structure can reach 62.8dB *** wavelength of the characteristic peak is fixed at the phase matching point, so intensity detection can be *** sensitivity can reach 272.5dB/*** structural optimization in this Letter provides a reference for the fabrication of an easy-made all-fiber sensor without extra cladding.