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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. 10 — Oct. 1, 1998
  • pp: 2552–2559

Optimum orientation of volume phase gratings in sillenite crystals: is it always [111]?

E. Shamonina, V. P. Kamenov, K. H. Ringhofer, G. Cedilnik, A. Kiessling, and R. Kowarschik  »View Author Affiliations


JOSA B, Vol. 15, Issue 10, pp. 2552-2559 (1998)
http://dx.doi.org/10.1364/JOSAB.15.002552


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Abstract

We study the simultaneous influence of optical activity, piezoelectric effect, and elasto-optic effect on two-wave mixing (TWM) under diffusion recording in photorefractive Bi12TiO20 and Bi12SiO20 crystals and find numerically the maximum of the TWM gain as a function of the orientation of the grating vector. Contrary to widespread belief, the grating orientation K[111] is the optimum orientation only if optical activity is negligibly small. Nonzero optical activity results in a strong dependence of the optimum grating orientation on the crystal thickness. The strongest deviation of the optimum from the [111] direction is achieved for ϱd=180°, where ϱ is the rotatory power and d is the crystal thickness. Our theory explains well prior results for crystals of moderate thickness and predicts new effects for thick (e.g., fiberlike) crystals.

© 1998 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.5330) Nonlinear optics : Photorefractive optics
(190.7070) Nonlinear optics : Two-wave mixing

Citation
E. Shamonina, V. P. Kamenov, K. H. Ringhofer, G. Cedilnik, A. Kiessling, and R. Kowarschik, "Optimum orientation of volume phase gratings in sillenite crystals: is it always [111]?," J. Opt. Soc. Am. B 15, 2552-2559 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-10-2552

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