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

Brandon Cochenour; Shawn P. O'Connor; Linda J. Mullen

doi:10.1117/1.OE.53.5.051406

16 December 2013 Suppression of forward-scattered light using high-frequency intensity modulation

Brandon Cochenour, Shawn P. O'Connor, Linda J. Mullen

Author Affiliations +

Optical Engineering, Vol. 53, Issue 5, 051406 (December 2013). https://doi.org/10.1117/1.OE.53.5.051406

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.

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Brandon Cochenour, Shawn P. O'Connor, and Linda J. Mullen "Suppression of forward-scattered light using high-frequency intensity modulation," Optical Engineering 53(5), 051406 (16 December 2013). https://doi.org/10.1117/1.OE.53.5.051406

Published: 16 December 2013

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