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Proceedings Paper

Simultaneous measurement of seawater temperature and depth using polarization-maintaining fiber Bragg grating and extrinsic Fabry-Perot interferometer
Author(s): Chen Zhao; Fuyin Wang; Wenhui Wang; Hong Luo; Shuidong Xiong
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Paper Abstract

In this paper, a sensor for simultaneous measurement of seawater temperature and depth using polarization-maintaining fiber Bragg grating (PM-FBG) and extrinsic Fabry-Perot interferometer (EFPI) is presented. The PM-FBG and the EFPI are cascaded into the sensor. Epoxy resin is used to increase the temperature sensitivity of PM-FBG while an aluminum sleeve is used to reduce the pressure sensitivity of PM-FBG. And the EFPI is formed by the pigtail of the PM-FBG and the stainless steel diaphragm at the end of the aluminum sleeve. The new sensor design, fabrication, packaging, and measurement are addressed. The performance of the sensor for the concurrent measurement of pressure and temperature is investigated by analyzing the experimental data, and the characteristic curves for the measurement of the sensor are presented. Experimental results show that the temperature sensitivity is about 25.18 pm/°C (left peak) and 24.69 pm/°C (right peak) and the pressure sensitivity is about 35.78 um/MPa.

Paper Details

Date Published: 12 December 2018
PDF: 4 pages
Proc. SPIE 10849, Fiber Optic Sensing and Optical Communication, 108490T (12 December 2018); doi: 10.1117/12.2505320
Show Author Affiliations
Chen Zhao, National Univ. of Defense Technology (China)
Fuyin Wang, National Univ. of Defense Technology (China)
Wenhui Wang, Central South Univ. (China)
Hong Luo, National Univ. of Defense Technology (China)
Shuidong Xiong, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 10849:
Fiber Optic Sensing and Optical Communication
Jie Zhang; Songnian Fu; Qunbi Zhuge; Ming Tang; Tuan Guo, Editor(s)

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