Highly Sensitive Temperature and Salinity Fiber Sensor based on Vernier Effect by Tapered-PMF in Sagnac-Interferometer

被引：1
作者：
Zhao, Fang [1 ]
Lin, Weihao [1 ]
Hu, Jie [1 ]
Liu, Shuaiqi [1 ]
Yu, Feihong [1 ]
Shum, Perry Ping [2 ]
Shao, Liyang [1 ]
机构：
[1] Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China
[2] Southern Univ Sci & Technol, Dept Elect & Elect Engn, Coll Engn, Shenzhen 518055, Peoples R China
来源：
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP | 2022年
关键词：
salinity sensor; MZI; Sagnac interference; Vernier effect;
D O I：
10.1109/ACP55869.2022.10088703
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：
A kind of highly sensitive salinity solution and temperature sensing system based upon Vernier effect in a single tapered-Sagnac interferometer structure is demonstrated. The sensing structure is produced by tapering polarization-maintaining fiber (PMF) in Sagnac loop. It is obviously observed that the envelope and wavelength shift is influenced by the external temperature and salinity concentration in the output spectrum of the sensing system. Thanks to the Vernier effect the sensitivity is elevated by an amplification factor. Changes in temperature and salinity will lead to a corresponding linear shift in the output spectral envelope. The experimental results state clearly that the sensitivity of the sensing system for temperature and salinity detection is -3.992nm/degrees C and 0.2687nm/parts per thousand, respectively. All in all, the proposed sensor has the characteristics of being easy to fabricate, low cost, and high sensitivity.
引用
收藏
页码：225 / 227
页数：3
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