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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 1 — Jan. 1, 1999
  • pp: 103–110

Ac square-wave field-induced subharmonics in photorefractive sillenite: threshold for excitation by inclusion of higher harmonics

Per M. Johansen, Henrik C. Pedersen, Evgeny V. Podivilov, and Boris I. Sturman  »View Author Affiliations


JOSA B, Vol. 16, Issue 1, pp. 103-110 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000103


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Abstract

We investigated both analytically and numerically the simultaneous influence of higher-harmonic gratings and subharmonic gratings on the threshold for generation of the subharmonic K/2 grating. The higher-harmonic grating causes feedback to the fundamental grating, thus leading to a nonlinear correction in dissipation, and the threshold for subharmonic generation is substantially modified by the presence of more subharmonics. The numerical solution shows that the inclusion of five higher-harmonic components and four subharmonic components are sufficient to cover the entire spatial region. The discrepancy between the analytical and the numerical solution increases with increased electric-field amplitude.

© 1999 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(160.5320) Materials : Photorefractive materials
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.5330) Nonlinear optics : Photorefractive optics

Citation
Per M. Johansen, Henrik C. Pedersen, Evgeny V. Podivilov, and Boris I. Sturman, "Ac square-wave field-induced subharmonics in photorefractive sillenite: threshold for excitation by inclusion of higher harmonics," J. Opt. Soc. Am. B 16, 103-110 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-1-103

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