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Optics Letters

Optics Letters


  • Vol. 26, Iss. 13 — Jul. 1, 2001
  • pp: 998–1000

Fast photorefractive response in strongly reduced near-stoichiometric LiNbO3 crystals

Xiao-Jun Chen, Deng-Song Zhu, Bing Li, Tao Ling, and Zhong-Kang Wu  »View Author Affiliations

Optics Letters, Vol. 26, Issue 13, pp. 998-1000 (2001)

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The photorefractive response time of LiNbO3 crystal is of the order of minutes, and such a long response time limits the crystal's practical applications. We report the photorefractive properties of nominally pure near-stoichiometric LiNbO3 crystal that is strongly reduced in vacuum. A short photorefractive response time of the order of 100 ms is measured at a wavelength of 514.5 nm, with incident light intensity of 1.6 W/cm 2 , and possible corresponding mechanisms are discussed. To our knowledge this is the first experimental evidence of a subsecond photorefractive response in pure LiNbO3 crystals. The diffraction efficiency of a holographic grating written in this reduced crystal is low but can be enhanced by an externally applied electric field.

© 2001 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics

Xiao-Jun Chen, Deng-Song Zhu, Bing Li, Tao Ling, and Zhong-Kang Wu, "Fast photorefractive response in strongly reduced near-stoichiometric LiNbO3 crystals," Opt. Lett. 26, 998-1000 (2001)

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