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Optics Letters

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  • Vol. 27, Iss. 15 — Aug. 1, 2002
  • pp: 1351–1353

Generation of doughnut laser beams by use of a liquid-crystal cell with a conversion efficiency near 100%

Djenan Ganic, Xiaosong Gan, Min Gu, Mathias Hain, Somakanthan Somalingam, Svetomir Stankovic, and Theo Tschudi  »View Author Affiliations


Optics Letters, Vol. 27, Issue 15, pp. 1351-1353 (2002)
http://dx.doi.org/10.1364/OL.27.001351


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Abstract

We present a novel technique for producing a doughnut laser beam by use of a liquid-crystal cell. It is demonstrated that the liquid-crystal cell exhibits an efficiency in energy conversion near 100%. One of the main advantages of this method is its capability of dynamic switching between a Gaussian mode and a doughnut mode of different topological charges. The liquid-crystal cell is also dynamically tunable over the visible and near-infrared wavelength range. These advantages make the device appealing for laser trapping methods used in single-molecule biomechanics and for optical guiding of cold atoms.

© 2002 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(250.0250) Optoelectronics : Optoelectronics
(350.5030) Other areas of optics : Phase

Citation
Djenan Ganic, Xiaosong Gan, Min Gu, Mathias Hain, Somakanthan Somalingam, Svetomir Stankovic, and Theo Tschudi, "Generation of doughnut laser beams by use of a liquid-crystal cell with a conversion efficiency near 100%," Opt. Lett. 27, 1351-1353 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-15-1351


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