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Analysis of Optic Fiber Hydrophone

WANG Jin-yu1,2, ZHANG Ling1, SUI Qing-mei1, CHANG Jun2 (1. School of Control Science & Engineering, Shandong University, Ji’nan 250061, China; 2. Institute of Laser, Shandong Academy of Science, Ji’nan 250014, China)  
According to the sensing principle, the optic fiber hydrophone includes the light-intensity modulation hydrophone, interference, and FGB. The light-intensity modulation hydrophone changes the optical power based on micro-bending. The interference hydrophone is based on optical interference. Through changing the pressure from underwater sound wave to fiber, change the refractive index of optical fiber core or length. Then, change the optical distance in optical fiber and acquire the water sound wave information by detecting the phase. The FBG hydrophone is based on principle, the pressure around sense grating changes with the underwater sound pressure.
【Fund】: 中国奖学金委员会基金;; 中国自然科学基金(60677027);; 山东省自然基金(Y2006G08);; 山东省科学院博士基金(2005-79)
【CateGory Index】: TB565.1
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