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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 12 — Dec. 1, 2012
  • pp: 3355–3359

Laser-induced wavefront distortion in optical materials: a general model

Luis C. Malacarne, Nelson G. C. Astrath, and Leandro S. Herculano  »View Author Affiliations


JOSA B, Vol. 29, Issue 12, pp. 3355-3359 (2012)
http://dx.doi.org/10.1364/JOSAB.29.003355


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Abstract

Wavefront distortion in optical components induced by thermal lensing may affect performance and stability of optical systems, such as high-power lasers, and is also the base of several photothermal techniques. This distortion is a result of complex photoelastic effects that characterize the degradation and the propagation of the beam. A simple analytical solution is obtained only for low absorbing materials, with the assumption that the stresses obey either thin-disk or long-rod type distributions. In a previous work, part of this limitation was overcome, in which a unified model was proposed for the optical path change for weakly absorbing materials, regardless of its thickness. In this work, we developed a generalized theoretical model for the optical path change that is related to the temperature profile in a relatively simple manner for all classes of absorbing optical materials. The modeling is based on the solution of the thermoelastic equation and provides time-dependent expressions for the temperature, surface displacement, and stresses. This generalized model could have a significant impact on designing laser systems and has direct application in photothermal techniques, which correlate optical path change to thermal, optical, and mechanical properties of solid materials.

© 2012 Optical Society of America

OCIS Codes
(350.5340) Other areas of optics : Photothermal effects
(350.6830) Other areas of optics : Thermal lensing

ToC Category:
Photothermal Effects

History
Original Manuscript: August 27, 2012
Manuscript Accepted: October 9, 2012
Published: November 20, 2012

Citation
Luis C. Malacarne, Nelson G. C. Astrath, and Leandro S. Herculano, "Laser-induced wavefront distortion in optical materials: a general model," J. Opt. Soc. Am. B 29, 3355-3359 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-12-3355

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