Mechanism of refractive index distribution measurement based on etched fiber Bragg grating

被引：0
|
作者：
Luo, Bin-bin [1 ]
Zhao, Ming-fu [1 ]
Zhou, Xiao-jun [2 ]
Shi, Sheng-hui [2 ]
Han, Xi [1 ]
Wang, Ying [1 ]
机构：
[1] Chongqing Univ Technol, Dept Elect Engn, Chongqing 400054, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Opto Elect Informat, Chengdu 610054, Peoples R China
来源：
22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3 | 2012年 / 8421卷
基金：
中国国家自然科学基金;
关键词：
fiber Bragg grating (FBG); refractive index (RI) distribution; inhomogeneous liquid medium; measurement; SENSOR;
D O I：
10.1117/12.974354
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
We present the mechanism of refractive index (RI) distribution measurement based on an etched fiber Bragg grating (FBG) with a residual diameter of about 5.73 mu m. The etched FBG is installed in a micro-tube where the RI of the liquid medium decreases linearly alone its axis. Experimental results show that the sensitivity of RI gradient and the average sensitivity of RI of this sensor is 336.2 nm.mm/RIU and 49.44 nm/RIU, respectively, when the RI ranging from 1.330 to 1.3586. The RI distribution of the inhomogeneous liquid medium can be obtained by the RI gradient sensitivity and the average RI sensitivity.
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页数：4
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