Journal
OPTICS LETTERS
Volume 38, Issue 19, Pages 3858-3861Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003858
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- ISF-Bikura
- Weizmann Institute Yale University exchange program
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An efficient method to tune the spatial coherence of a degenerate laser over a broad range with minimum variation in the total output power is presented. It is based on varying the diameter of a spatial filter inside the laser cavity. The number of lasing modes supported by the degenerate laser can be controlled from 1 to 320,000, with less than a 50% change in the total output power. We show that a degenerate laser designed for low spatial coherence can be used as an illumination source for speckle-free microscopy that is nine orders of magnitude brighter than conventional thermal light. (C) 2013 Optical Society of America
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