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Optical Engineering

Suppression of forward-scattered light using high-frequency intensity modulation
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Paper Abstract

Laser imaging through a turbid medium is complicated by scattering. Backscattered photons reduce image contrast as weak target returns compete against a large background of backscattered light. Forward scattering broadens the interrogating laser beam, thereby reducing the spatial resolution of the target. Prior research has shown that intensity modulation (<100  MHz ) can be used to “wash-out” the backscatter, resulting in better discrimination of the target and higher contrast. We show that the higher modulation frequencies (>100  MHz ) can be also used to suppress forward scattered light, thereby increasing spatial resolution.

Paper Details

Date Published: 16 December 2013
PDF: 8 pages
Opt. Eng. 53(5) 051406 doi: 10.1117/1.OE.53.5.051406
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Brandon Cochenour, Naval Air Warfare Ctr. Aircraft Div. (United States)
Shawn P. O'Connor, Naval Air Warfare Ctr. Aircraft Div. (United States)
Linda J. Mullen, Naval Air Systems Command (United States)

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