Abstract
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.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
Linda Mullen, Robert Lee, and Justin Nash
Appl. Opt. 55(31) C18-C24 (2016)
David W. Illig, William D. Jemison, and Linda J. Mullen
Appl. Opt. 55(31) C25-C33 (2016)
Janet L. Machol
Appl. Opt. 36(24) 6021-6023 (1997)