Fiber Bragg grating sensor for measuring rate of dissipation of turbulent kinetic energy of ocean

被引：6
|
作者：
Wang, Li [1 ,2 ]
Wang, Yongjie [1 ,2 ]
Wang, Jianfeng [3 ]
Ch'ien, Libin [1 ,2 ]
Li, Fang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Labs Transducer Technol, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China
[3] Chinese Acad Sci, Inst Oceanol, Qingdao, Shandong, Peoples R China
来源：
OPTICAL ENGINEERING | 2020年 / 59卷 / 08期
关键词：
comparative experiments; fiber Bragg grating; turbulence sensors; SMALL-SCALE TURBULENCE; MICROSTRUCTURE; SHEAR;
D O I：
10.1117/1.OE.59.8.087105
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Fiber optic microstructure turbulence sensors (FOMTS) with fiber Bragg gratings can measure the rate of tangential velocity change caused by ocean turbulence. The theoretical principles of the FOMTS and demodulation were verified by a prototype. The demodulation system resolution reached 0.001 pm/root Hz, the sensitivity was 4.37 x 10(-16) m(2) s(2)/kg, and its natural frequency in air was 595 Hz, similar to the theoretical values. Its resonance frequency in water (534 Hz), exceeded the highest frequency of ocean turbulence (200 Hz). Furthermore, comparative experiments between the FOMTS and a commercially available sensor were performed. Good signal correspondence was observed, proving the effectiveness of the FOMTS and verifying the design principle. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：11
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