Simultaneous measurement of refractive index and temperature using a hybrid-grating sensor

被引：8
作者：
Fan, Xiaojun [1 ,2 ,3 ]
Jiang, Junfeng [1 ,2 ,3 ]
Zhang, Xuezhi [1 ,2 ,3 ]
Liu, Kun [1 ,2 ,3 ]
Wan, Shuang [1 ,2 ,3 ]
Liu, Tiegen [1 ,2 ,3 ]
机构：
[1] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Inst Opt Fiber Sensing, Tianjin Opt Fiber Sensing Engn Ctr, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Minist Educ, Key Lab Optoelect Informat Technol, Tianjin 300072, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 11期
基金：
中国国家自然科学基金;
关键词：
LONG-PERIOD;
D O I：
10.7567/1882-0786/ab4407
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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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页数：6
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