20-mm-Diameter Interferometric Hydrophone Towed Array Based on Fiber Bragg Gratings

被引：18

作者：

Guo Zhen ^{[1
]}

Gao Kan ^{[1
]}

Yang Hui ^{[1
]}

Dai Zhiguo ^{[1
]}

Wu Bingyan ^{[1
]}

Zhang Jun ^{[1
]}

机构：

[1] China Elect Technol Grp Corp, Res Inst 23, Shanghai 200437, Peoples R China

来源：

ACTA OPTICA SINICA | 2019年 / 39卷 / 11期

关键词：

fiber optics; fiber hydrophone; fiber Bragg grating; crosstalk; polarization induced fading;

D O I：

10.3788/AOS201939.1106003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Based on a interferometric optical fiber hydrophone, a fiber Bragg grating (FBG) hydrophone towed array with a diameter of 20 mm is realized. This single-fiber hydrophone array without splices is realized by using the multi-wavelength FBG continuous writing technique. The average acoustic pressure sensitivity of a hydrophone unit is -143.9 dB, and the fluctuation of sensitivity is limited within 3 dB. To suppress the crosstalk in the FBG hydrophone array, weak-reflectivity FBGs arc utilized, reducing the crosstalk to 53 dB. Moreover, polarization-induced fading is eliminated by three-channel polarization diversity receiving. A 32-element FBG hydrophone towed array with a diameter of 20 mm is fabricated.

引用

页数：6

共 13 条

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