Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry

Martin Laurenzis; Yves Lutz; Frank Christnacher; Alexis Matwyschuk; Jean-Michel Poyet

doi:10.1117/1.OE.51.6.061302

7 May 2012 Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry

Martin Laurenzis, Yves Lutz, Frank Christnacher, Alexis Matwyschuk, Jean-Michel Poyet

Author Affiliations +

Optical Engineering, Vol. 51, Issue 6, 061302 (May 2012). https://doi.org/10.1117/1.OE.51.6.061302

Abstract

We present simple illumination devices with built-in speckle reduction using the spatial diversity approach. These devices are based on a waveguide homogenization technique with a transmission efficiency of up to 95%. Even for single-laser pulse illumination from a solid-state laser source a reduction of the speckle contrast by a factor of 4.5 was demonstrated. In detail, we present two different illumination devices based on either a solid-state laser source or an array of semiconductor laser diodes. These illumination devices are used for range-gated imaging and active polarimetry with speckle-free and homogeneous illumination.

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Martin Laurenzis, Yves Lutz, Frank Christnacher, Alexis Matwyschuk, and Jean-Michel Poyet "Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry," Optical Engineering 51(6), 061302 (7 May 2012). https://doi.org/10.1117/1.OE.51.6.061302

Published: 7 May 2012

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