Optical noise of a 1550 nm fiber laser as an underwater acoustic sensor

被引:0
|
作者
Orsal, B. [1 ]
Tow, K. Hey [1 ]
Vacher, R.
Dureisseix, D.
机构
[1] Univ Montpellier 2, CNRS, IES, UMR 5214,Res Team Bruit Optoelect,CC 084, Pl Eugene Bataillon, F-34095 Montpellier 05, France
来源
NOISE AND FLUCTUATIONS | 2009年 / 1129卷
关键词
Distributed FeedBack Fiber Laser; Optical Noise; Underwater; Acoustic Sensor; Deep Sea State Zero;
D O I
暂无
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
The goal of this presentation is to provide first results concerning the optical noise of a fiber laser used as an underwater acoustic sensor: hydrophone. The main sensor characteristics are: -1): A sensitivity allowing to detect all noise levels above background sea noise (the so-called deep-sea state 0). Among other applications, one may mention: seismic risk prevention, oil prospection, ship detection, etc. -2) : An optical noise reduced to its minimal value: it is the lower bound below which no acoustic pressure variation is detectable. We therefore present here the first results for the expected sensitivity of the acousto-optic sensors, the frequency and amplitude of optical noises induced by the fiber laser and all the devices on the optical line. These results exemplify the possible detection of signal levels as low as the deep-sea state noise 0, especially for low frequency bandwidths, from several Hertz up to several kiloHertz.
引用
收藏
页码:379 / +
页数:2
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