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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 7 — Jul. 1, 1998
  • pp: 2092–2098

Effects of strong modulation on beam-coupling gain in photorefractive materials: application to B 12 SiO 20

J. G. Murillo, L. F. Magana, M. Carrascosa, and F. Agullo-Lopez  »View Author Affiliations


JOSA B, Vol. 15, Issue 7, pp. 2092-2098 (1998)
http://dx.doi.org/10.1364/JOSAB.15.002092


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Abstract

The steady-state beam-coupling gain during two-wave mixing in photorefractive materials has been analyzed in the strong nonlinear regime (high modulation depths). Numerical simulations have been carried out for B 12 SiO 20 , for which detailed information on photorefractive parameters is already available. First the amplitude and the phase mismatch (with regard to the light) of the recorded index grating and consequently the coupling gain coefficient were obtained under an applied field E 0 =5 kV/cm . Then the evolution of the intensities of the two interfering beams during propagation was determined for several light-modulation depths. The energy exchange was considerably enhanced with regard to the linear regime. The light and index fringe profiles at large modulation m were also obtained. The bending for both kinds of fringe differed appreciably from that previously calculated with a linear approach to the material equations. 1998 Optical Society of America S0740-3224(98)00207-0

[Optical Society of America ]

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(090.2900) Holography : Optical storage materials
(190.5330) Nonlinear optics : Photorefractive optics

Citation
J. G. Murillo, L. F. Magana, M. Carrascosa, and F. Agullo-Lopez, "Effects of strong modulation on beam-coupling gain in photorefractive materials: application to B 12 SiO 20," J. Opt. Soc. Am. B 15, 2092-2098 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-7-2092


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