Modulated pulse laser with pseudorandom coding capabilities for underwater ranging, detection, and imaging

被引：69

作者：

Cochenour, Brandon ^{[1
,2
]}

Mullen, Linda ^{[1
]}

Muth, John ^{[2
]}

机构：

[1] USN, Air Syst Command, Patuxent River, MD 20670 USA

[2] N Carolina State Univ, Elect & Comp Engn Dept, Raleigh, NC 27695 USA

来源：

APPLIED OPTICS | 2011年 / 50卷 / 33期

关键词：

RADAR; LIGHT; PROPAGATION;

D O I：

10.1364/AO.50.006168

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical detection, ranging, and imaging of targets in turbid water is complicated by absorption and scattering. It has been shown that using a pulsed laser source with a range-gated receiver or an intensity modulated source with a coherent RF receiver can improve target contrast in turbid water. A blended approach using a modulated-pulse waveform has been previously suggested as a way to further improve target contrast. However only recently has a rugged and reliable laser source been developed that is capable of synthesizing such a waveform so that the effect of the underwater environment on the propagation of a modulated pulse can be studied. In this paper, we outline the motivation for the modulated-pulse (MP) concept, and experimentally evaluate different MP waveforms: single-tone MP and pseudorandom coded MP sequences.

引用

页码：6168 / 6178

页数：11

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