Structure Design of Disposable Ocean Temperature Depth Sensing Probe Based on F-P Cavity and FBG

作     者：Zhaoyue Liu Lina Zeng Ke Xu Qihan Wu Yichao Shu Xin Liao Zaijin Li Hao Chen Zhongliang Qiao Yi Qu Guojun Liu Lin Li Zhaoyue Liu;Lina Zeng;Ke Xu;Qihan Wu;Yichao Shu;Xin Liao;Zaijin Li;Hao Chen;Zhongliang Qiao;Yi Qu;Guojun Liu;Lin Li

作者机构：Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Physics and Electronic Engineering Hainan Normal University Haikou China 

出 版 物：《Journal of Applied Mathematics and Physics》 (应用数学与应用物理（英文）)

年 卷 期：2021年第9卷第11期

页      面：2947-2953页

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

主　　题：F-P Cavity Fiber Grating Laser Sensing Liquid Filling 

摘      要： The basic principle of sensing is the combination of F-P cavity interference and fiber grating reflection. A hybrid structure sensor probe has been designed based on the combination of an F-P cavity of liquid-filled thermometer structure, and a fiber grating with an elastic diaphragm, herein F-P cavity is used for temperature sensing, and the fiber grating is used for pressure sensing. By adopting the dual optical path structure, the dual-parameter detection of temperature and depth is realized, which solves the problem of low accuracy caused by the cross response of temperature and pressure of a single sensor device and the calculation of the depth information of the ocean with empirical formulas. Compared with traditional sensors, the sensitivity is effectively improved. Theoretical analysis shows that the sensitivity of the F-P cavity with a thermometer structure filled with kerosene reaches 1.334 nm/?C, and the depth sensitivity of the fiber grating is 284.6 pm/Mpa within the ocean depth range of 0 - 400 m.