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Optics Letters

Optics Letters

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  • Vol. 36, Iss. 19 — Oct. 1, 2011
  • pp: 3843–3845

Adiabatic self-focusing in media with spatially variable nonlinearity

Luai Al Fares, Fabrice Devaux, and Mathieu Chauvet  »View Author Affiliations


Optics Letters, Vol. 36, Issue 19, pp. 3843-3845 (2011)
http://dx.doi.org/10.1364/OL.36.003843


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Abstract

An optical medium whose nonlinearity can be spatially adjusted is considered to study beam reshaping. The concept is applied to perform adiabatic self-focusing of broad beams. Experimental results are obtained in a photorefractive lithium niobate crystal where the self-focusing nonlinearity is controlled over propagation by a temperature gradient. As a demonstration, gradual self-focusing is shown to transform an incoming beam into an output circular spot 10 times smaller over a 2 cm long crystal submitted to a 30 ° C temperature gradient. Once formed, the adiabatic self-focused beam has inscribed a funnel waveguide in the crystal.

© 2011 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(260.5950) Physical optics : Self-focusing

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 23, 2011
Revised Manuscript: August 29, 2011
Manuscript Accepted: September 6, 2011
Published: September 26, 2011

Citation
Luai Al Fares, Fabrice Devaux, and Mathieu Chauvet, "Adiabatic self-focusing in media with spatially variable nonlinearity," Opt. Lett. 36, 3843-3845 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-19-3843

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