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

被引：67
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
收藏
页码：6168 / 6178
页数：11
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