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Optics Letters

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  • Editor: Anthony J. Campilo
  • Vol. 32, Iss. 17 — Sep. 1, 2007
  • pp: 2626–2628

Spatially variable retardation plate for beam brightness enhancement in a high-power laser

G. Machavariani, S. Jackel, Y. Lumer, I. Moshe, and A. Meir  »View Author Affiliations


Optics Letters, Vol. 32, Issue 17, pp. 2626-2628 (2007)
http://dx.doi.org/10.1364/OL.32.002626


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Abstract

We present a simple and robust method for brightness enhancement, efficiently transforming a radially polarized LG ( 0 , 1 ) * mode into a nearly Gaussian beam of much higher quality. We use for this a spatially variable retardation plate and a spatial filter. The analysis shows that the transformation yields an increase in brightness by a factor of 3.4. In the experiment, we transformed a high-power Nd:YAG radially polarized ( 0 , 1 ) * LG beam with power of 70 W and M 2 = 2.6 into a nearly Gaussian beam with M 2 = 1.36 . This resulted in brightness enhancement by a factor of 2.6.

© 2007 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(230.5440) Optical devices : Polarization-selective devices

ToC Category:
Optical Devices

History
Original Manuscript: April 30, 2007
Revised Manuscript: July 11, 2007
Manuscript Accepted: July 17, 2007
Published: August 30, 2007

Citation
G. Machavariani, S. Jackel, Y. Lumer, I. Moshe, and A. Meir, "Spatially variable retardation plate for beam brightness enhancement in a high-power laser," Opt. Lett. 32, 2626-2628 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-17-2626


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