Implementation and Characterization of Liquid-Level Sensor Based on a Long-Period Fiber Grating Mach-Zehnder Interferometer

被引：75
|
作者：
Fu, Hongyan [1 ]
Shu, Xuewen [2 ]
Zhang, Aping [3 ]
Liu, Weisheng [3 ]
Zhang, Lin [2 ]
He, Sailing [3 ]
Bennion, Ian [2 ]
机构：
[1] Xiamen Univ, Dept Elect Engn, Xiamen 361005, Fujian, Peoples R China
[2] Aston Univ, Photon Res Grp, Birmingham B4 7ET, W Midlands, England
[3] Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Zhejiang, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2011年 / 11卷 / 11期
关键词：
Fiber sensor; liquid-level sensor (LLS); long-period fiber grating (LPG); Mach-Zehnder interferometer;
D O I：
10.1109/JSEN.2011.2145416
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An optical liquid-level sensor (LLS) based on a long-period fiber grating (LPG) interferometer is proposed and experimentally demonstrated. Two identical 3-dB LPGs are fabricated to form an in-fiber Mach-Zehnder interferometer, and the fiber portion between two LPGs is exposed to the liquid as the sensing element. The sensitivity and measurement range of the sensors employing different orders of cladding modes are investigated both theoretically and experimentally. The experimental results show good linearity and large measurement range. One of the significant advantages of such a sensing structure is that the measurement level is not limited to the length of the LPG itself. Also, the measurement range and sensitivity of the proposed LLS can be readily tailored for a particular applications.
引用
收藏
页码：2878 / 2882
页数：5
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