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Optics Letters

Optics Letters

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  • Vol. 36, Iss. 20 — Oct. 15, 2011
  • pp: 4035–4037

High-damage-threshold static laser beam shaping using optically patterned liquid-crystal devices

C. Dorrer, S. K.-H. Wei, P. Leung, M. Vargas, K. Wegman, J. Boulé, Z. Zhao, K. L. Marshall, and S. H. Chen  »View Author Affiliations


Optics Letters, Vol. 36, Issue 20, pp. 4035-4037 (2011)
http://dx.doi.org/10.1364/OL.36.004035


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Abstract

Beam shaping of coherent laser beams is demonstrated using liquid crystal (LC) cells with optically patterned pixels. The twist angle of a nematic LC is locally set to either 0 or 90 ° by an alignment layer prepared via exposure to polarized UV light. The two distinct pixel types induce either no polarization rotation or a 90 ° polarization rotation, respectively, on a linearly polarized optical field. An LC device placed between polarizers functions as a binary transmission beam shaper with a highly improved damage threshold compared to metal beam shapers. Using a coumarin-based photoalignment layer, various devices have been fabricated and tested, with a measured single- shot nanosecond damage threshold higher than 30 J / cm 2 .

© 2011 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 15, 2011
Revised Manuscript: September 19, 2011
Manuscript Accepted: September 20, 2011
Published: October 7, 2011

Citation
C. Dorrer, S. K.-H. Wei, P. Leung, M. Vargas, K. Wegman, J. Boulé, Z. Zhao, K. L. Marshall, and S. H. Chen, "High-damage-threshold static laser beam shaping using optically patterned liquid-crystal devices," Opt. Lett. 36, 4035-4037 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-20-4035

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