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Proceedings Paper

Variable flattened Gaussian beam order selection by dynamic control of an intracavity diffractive mirror
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Paper Abstract

In this paper we present the design of an optical resonator that produces as the stable transverse mode a flattened Gaussian laser beam by making use of an intra-cavity diffractive mirror. We consider the modal build-up in such a resonator and propose the required dynamic changes to an intra-cavity piezoelectric unimorph mirror for selecting the flattened Gaussian beam order of the stable mode. The feasibility of using a deformable diffractive mirror is demonstrated numerically. An optimization approach is employed to determine the optimal voltage distribution required to deform the mirror into a prescribed shape for the selection of the flattened Gaussian beam order. Good agreement between an ideal static diffractive mirror and the proposed adaptive mirror is achieved.

Paper Details

Date Published: 12 September 2008
PDF: 9 pages
Proc. SPIE 7062, Laser Beam Shaping IX, 706219 (12 September 2008); doi: 10.1117/12.793698
Show Author Affiliations
Andrew Forbes, CSIR National Laser Ctr. (South Africa)
Univ. of KwaZulu-Natal (South Africa)
Craig S. Long, CSIR Material Science and Manufacturing (South Africa)
Igor Litvin, CSIR National Laser Ctr. (South Africa)
Univ. of Stellenbosch (South Africa)
Philip W. Loveday, Council for Scientific and Industrial Research (South Africa)
Vladimir Belyi, B.I. Stepanov Institute of Physics (Belarus)
Nikolai S. Kazak, B.I. Stepanov Institute of Physics (Belarus)

Published in SPIE Proceedings Vol. 7062:
Laser Beam Shaping IX
Andrew Forbes; Todd E. Lizotte, Editor(s)

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