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  • Optics and Photonics News
  • Vol. 27,
  • Issue 12,
  • pp. 35-35
  • (2016)

Controlling Spatial Coherence

Ronen Chriki, Vishwa Pal, Chene Tradonsky, Gilad Barach, Asher A. Friesem, Nir Davidson, Sebastian Knitter, Changgeng Liu, Brandon Redding, Mustafa K. Khokha, Michael A. Choma, and Hui Cao

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Abstract

Control of spatial coherence can suppress speckle noise, improve image quality and overcome deleterious effects of propagation through random or turbulent media. We recently showed that inserting an intra-cavity binary amplitude mask into degenerate cavity lasers with a large number of modes (typically 103-105) allows rapid and efficient tuning of the lasers’ degree of spatial coherence. The mask serves as a spatial filter that modifies the degenerate cavity laser by introducing loss to undesired modes

© 2016 Optical Society of America

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