A hybrid-grating-based optical fiber sensor for simultaneously measuring the refractive index (RI) and temperature is proposed. The sensor is fabricated by inscribing a long period grating (LPG) and tilted fiber Bragg grating (TFBG) in the same region of an optical fiber in sequence. The hybrid grating takes advantage of both LPG's high temperature sensitivity and TFBG's high RI sensitivity, with consideration of the temperature-insensitive characteristic of wavelength difference between the cladding mode wavelength and core mode wavelength of TFBG. Experiments prove the ability of the sensor to measure the RI and temperature simultaneously. The sensitivities are 606.82 nm/RIU and 268.79 pm degrees C-1, respectively. (C) 2019 The Japan Society of Applied Physics
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North Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R ChinaNorth Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R China
Kuang, Jiangping
Guo, Chong
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Beijing Inst Astronaut Syst Engn, Beijing 100076, Peoples R ChinaNorth Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R China
Guo, Chong
Wang, Yijiang
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North Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R ChinaNorth Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R China
Wang, Yijiang
Jia, Pinggang
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North Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R ChinaNorth Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R China
Jia, Pinggang
Zhang, Yanjun
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North Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R ChinaNorth Univ China, State Key Lab Dynam Measurement Technol, Taiyuan 030051, Peoples R China
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Tianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of TechnologyTianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of Technology
曹晔
杨寅飞
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Tianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of TechnologyTianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of Technology
杨寅飞
杨秀峰
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Tianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of TechnologyTianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of Technology
杨秀峰
童峥嵘
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Tianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of TechnologyTianjin Key Laboratory of Film Electronic and Communication Devices,School of Computer and Communication Engineering,Tianjin University of Technology