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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 24 — Aug. 20, 2006
  • pp: 6218–6222

Simple optical method for determination of crystal orientation in photorefractive crystals

Di Qu, Ru Guo, Simin Liu, Zhaohong Liu, and Yuanmei Gao  »View Author Affiliations

Applied Optics, Vol. 45, Issue 24, pp. 6218-6222 (2006)

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A simple optical method for determination of crystallographic orientations ±x, ±y, and ±z in photorefractive crystals based on light amplification via backward two-wave mixing (TWM) is presented. We consider a photorefractive Fe-doped lithium niobate crystal (LiNbO3:Fe) with a standard xyz cut as an example to illustrate the principle, manipulation, and experimental results of this method in detail. Also we see that the direction of the light amplification, namely, the direction of the nonreciprocal steady-state energy transfer, strongly depends on the direction of the grating vector with respect to the corresponding crystallographic axes mainly under the diffusion mechanism. Finally, a way of determining the sign of the charge carriers in photorefractive materials is proposed.

© 2006 Optical Society of America

OCIS Codes
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(190.7070) Nonlinear optics : Two-wave mixing

Original Manuscript: January 9, 2006
Revised Manuscript: April 13, 2006
Manuscript Accepted: April 13, 2006

Di Qu, Ru Guo, Simin Liu, Zhaohong Liu, and Yuanmei Gao, "Simple optical method for determination of crystal orientation in photorefractive crystals," Appl. Opt. 45, 6218-6222 (2006)

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