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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 4 — Apr. 1, 2014
  • pp: 919–925

Photovoltaic laser beam degradation in lithium niobate planar waveguides: two-center model approach

A. Alcázar, J. Ramiro, A. Méndez, J. Villarroel, M. Carrascosa, A. García-Cabañes, and J. M. Cabrera  »View Author Affiliations

JOSA B, Vol. 31, Issue 4, pp. 919-925 (2014)

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Photovoltaic laser beam degradation in lithium niobate (LiNbO3) has been investigated through a finite-differences beam propagation method for nonlinear media. The simulations use a two-center model (Fe2+Fe3+, NbLi4+NbLi5+) that has been recently proved to be necessary to successfully describe the photorefractive effect in nominally pure LiNbO3. Refractive index profiles and intensity and phase beam profiles have been calculated for a wide intensity range and several material distances. A good agreement is obtained on comparing simulations and experimental data. This includes self-defocusing for moderate intensities and the complex beam profile structures appearing for high intensities, providing a complete description of this nonlinear optical phenomenon.

© 2014 Optical Society of America

OCIS Codes
(160.3730) Materials : Lithium niobate
(190.5330) Nonlinear optics : Photorefractive optics
(230.7370) Optical devices : Waveguides

ToC Category:
Optical Devices

Original Manuscript: November 26, 2013
Revised Manuscript: March 10, 2014
Manuscript Accepted: March 10, 2014
Published: March 31, 2014

A. Alcázar, J. Ramiro, A. Méndez, J. Villarroel, M. Carrascosa, A. García-Cabañes, and J. M. Cabrera, "Photovoltaic laser beam degradation in lithium niobate planar waveguides: two-center model approach," J. Opt. Soc. Am. B 31, 919-925 (2014)

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