Determination of sea-water cut-off frequency by backscattering transfer function measurement

被引：62

作者：

Pellen, F ^{[1
]}

Intes, X ^{[1
]}

Olivard, P ^{[1
]}

Guern, Y ^{[1
]}

Cariou, J ^{[1
]}

Lotrian, J ^{[1
]}

机构：

[1] Univ Bretagne Occidentale, Lab Spectrometrie & Opt Laser, F-29285 Brest, France

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2000年 / 33卷 / 04期

关键词：

D O I：

10.1088/0022-3727/33/4/306

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temporal frequency response of water supplemented with scattering particles was deduced from the measurement of the optical backscattering of a shea (100 ps) blue-green (532 nm) optical pulse given by a frequency-doubled Nd:YAG laser. Indeed, this backscattering measurement gave the water impulse response from which the transfer function was computed by taking the power spectrum. This backscattering frequency response had a low-pass filter-like response which enabled us to estimate the medium cut-off frequency. As the backscattered signal shape depends on the value of the water attenuation coefficient, the ocean water cut-off frequency varies with the amount of scattering particles its contains. The aim was to define the variations of the cut-off frequency as a function of the attenuation coefficient.

引用

页码：349 / 354

页数：6

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