Laser adaptive fiber-optic hydrophone

被引：9

作者：

Romashko, R. V. ^{[1
,2
]}

Bezruk, M. N. ^{[1
]}

Ermolaev, S. A. ^{[1
]}

Zavestovskaya, I. N. ^{[3
,4
]}

Kulchin, Yu N. ^{[1
,4
]}

机构：

[1] Russian Acad Sci, Inst Automat & Control Proc, Far East Branch, Vladivostok 690041, Russia

[2] Far Eastern Fed Univ, Vladivostok 690950, Russia

[3] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

[4] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

来源：

BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE | 2015年 / 42卷 / 07期

基金：

俄罗斯科学基金会;

关键词：

hydrophone; adaptive interferometer; dynamic hologram; acoustic pressure;

D O I：

10.3103/S1068335615070027

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An implementation scheme of the adaptive fiber-optic laser hydrophone with a membrane-type fiber-optic sensor as a sensitive element is proposed and studied. The sensor signal is phase demodulated using an adaptive holographic interferometer whose key element is a dynamic hologram formed in a photorefractive CdTe crystal. The hydrophone is distinguished by high noise immunity and high sensitivity (-117 dB rel. to 1 V/A mu Pa at a frequency of 4.9 kHz) providing stable detection of hydroacoustic signals with an acoustic pressure from 31 dB (rel. to 20 A mu Pa) in the dynamic range to 42 dB (at 9.6 kHz).

引用

页码：201 / 205

页数：5

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