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《Electronic Technology》 2012-01
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High Sensitivity Refractive Index Sensor based on a Tapered Single-mode-Multimode-Single-mode Fiber Structure

Zhang Ying Zou Weiwen Li Xinwan Mao Jingwei Li Shuguang Jiang Wenning Chen Jianping (State Key Laboratory on Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)  
A modal interferometer is demonstrated by tapering a single-modemultimode-single-mode(SMS) fiber structure heated by hydrogen flame.An interference fringe with the free spectral range(FSR) of 1.3 nm and extinction ratio of ~10dB is experimentally observed when the tapering length is 35mm.There exists stronger evanescent field in the SMS fiber structure when the waist diameter of the tapered multimode fiber is as thin as ~3.85μm.The refractive index sensitivity is up to 771nm/RIU in the RI range of 1.35~1.36.The sensor can accurately monitor the diffusion phenomenon of liquid solute.
【Fund】: 国家973计划(ID2011CB301700)资助;; 国家自然科学基金项目(60877012 61071011 61001074 61007039 61007052)资助;; 上海市重大基础项目(10DJ1400402)资助;; 上海市重点基础项目(09JC1408100)资助
【CateGory Index】: TN253;TP212.14
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【Co-references】
Chinese Journal Full-text Database 10 Hits
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7 WANG Wei,LI En-bang,ZHANG Chen-liang,LV peng,TANG Chun-xiao(College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China);Simulation and experimental studies of multimode-interference based fiber-optic temperature sensors[J];Journal of Optoelectronics.Laser;2008-12
8 LI En-bang1,ZHENG Dan-ying2,ZHANG Chen-liang2,TANG Chun-xiao1 (1.Tianjin Polytechnic University,Tianjin 300160,China;2.College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China);A refractive index sensor based on the multimode interference in a hollow fiber[J];Journal of Optoelectronics.Laser;2010-10
9 ZHAO Jin-ting,TONG Zheng-rong,YANG Xiu-feng,YU Hui,YAO Bin(Tianjin Key Laboratory of Film Electronic and Communication Device,Key Laboratory of Intelligent computing and Novel Software technology,Engineering Research Center of Communication Devices,Ministry of Education,School of Computer and Communication Engineering,Tianjin University of Technology,Tianjin 300384,China);Experimental research of liquid-level sensor using LPFG[J];Journal of Optoelectronics.Laser;2010-12
10 TANG Chun-xiao1,LI En-bang1,WANG Chang-le2,LI Chao2,ZHENG Dan-ying2(1.School of Information and Communication Engineering,Tianjin Polytechnic University,Tianjin 300160,China;2.College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 30072,China);Reflection-type fiber-optic biosensor based on multimode interference[J];Journal of Optoelectronics.Laser;2011-08
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