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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 19 — Oct. 1, 2013
  • pp: 3858–3861

Efficient method for controlling the spatial coherence of a laser

M. Nixon, B. Redding, A. A. Friesem, H. Cao, and N. Davidson  »View Author Affiliations


Optics Letters, Vol. 38, Issue 19, pp. 3858-3861 (2013)
http://dx.doi.org/10.1364/OL.38.003858


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Abstract

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.

© 2013 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(140.4780) Lasers and laser optics : Optical resonators

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: May 20, 2013
Revised Manuscript: August 28, 2013
Manuscript Accepted: August 28, 2013
Published: September 24, 2013

Virtual Issues
September 27, 2013 Spotlight on Optics

Citation
M. Nixon, B. Redding, A. A. Friesem, H. Cao, and N. Davidson, "Efficient method for controlling the spatial coherence of a laser," Opt. Lett. 38, 3858-3861 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-19-3858


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