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Proceedings Paper

Beam combining with using beam shaping
Author(s): Alexander Laskin; Derrek Drachenberg; Sergey Mokhov; George Venus; Leonid Glebov; Vadim Laskin
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Paper Abstract

Performance of spectral beam combining depends on thermal effects on the optical components like volume Bragg gratings used for spectral selectivity of the beams combined. These thermal effects are results of absorption of laser radiation and in case of high power lasers can lead to reduction of efficiency of combining and losses. For example the Gaussian intensity distribution of laser beam leads to higher temperature in the central part of a grating and, hence, changing its operating specifications. Homogenizing of the temperature profile over the working field of a volume Bragg grating would increase efficiency of its operation. This can be realized through applying the beam shaping optics, for example refractive field mapping beam shapers providing high flexibility in building various optical setups due to their unique features: almost lossless intensity profile transformation, providing flattop, super Gauss or inverse Gauss profiles with the same beam shaper, saving of the beam consistency, high transmittance and flatness of output beam profile, extended depth of field, capability to adapt to real intensity profiles of TEM00 and multimode laser sources. This paper will describe some design basics of refractive beam shapers of the field mapping type, with emphasis on the features important for building and applications of high-power laser sources. There will be presented results of applying the refractive beam shapers in real research installations.

Paper Details

Date Published: 7 May 2012
PDF: 6 pages
Proc. SPIE 8381, Laser Technology for Defense and Security VIII, 83811K (7 May 2012); doi: 10.1117/12.920515
Show Author Affiliations
Alexander Laskin, AdlOptica GmbH (Germany)
Derrek Drachenberg, Univ. of Central Florida (United States)
Sergey Mokhov, Univ. of Central Florida (United States)
George Venus, Univ. of Central Florida (United States)
Leonid Glebov, Univ. of Central Florida (United States)
Vadim Laskin, AdlOptica GmbH (Germany)

Published in SPIE Proceedings Vol. 8381:
Laser Technology for Defense and Security VIII
Mark Dubinskii; Stephen G. Post, Editor(s)

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