Highly reflective long period fiber grating sensor and its application in refractive index sensing

被引：90
|
作者：
Qi, Liang [1 ]
Zhao, Chun-Liu [1 ]
Yuan, Jianying [1 ]
Ye, Manping [1 ]
Wang, Jianfeng [1 ]
Zhang, Zaixuan [1 ]
Jin, Shangzhong [1 ]
机构：
[1] China Jiliang Univ, Inst Optoelect Technol, Hangzhou 310018, Zhejiang, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 193卷
基金：
中国国家自然科学基金;
关键词：
Reflective long period fiber grating; Refractive index sensor; Long distance application; Intensity demodulation; MODE;
D O I：
10.1016/j.snb.2013.11.063
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work a highly reflective long period fiber grating (RLPG) sensor is proposed. The sensor was fabricated by depositing the silver atom on both surfaces of the flat end-face and the tail profile of long period fiber grating (LPG), which makes the LPG work in high reflection mode without interferometric fringe and enhances the coupling at the resonant wavelength of original LPG. The RI-response characteristic of the RLPG was investigated. The reflection spectrum remains the resonant dip without interference infringe and the resonant wavelength has obvious blue shift with the increase of external RI. By utilizing the above characteristic, we propose an application for long distance RI measurement combining a standard optical time domain reflectometer (OTDR). Preliminary results of using the sensor to measure the refractive index of glycerol/water solutions in a distance of 100 km were successfully demonstrated. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：185 / 189
页数：5
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