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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 1 — Jan. 1, 2009
  • pp: 133–140

Quantitative measurement for the saturated modulation of photorefractive index gratings in Li Nb O 3

Shon-Fu Chen, Yu-Fong Tseng, and Chien-Chou Chen  »View Author Affiliations


JOSA B, Vol. 26, Issue 1, pp. 133-140 (2009)
http://dx.doi.org/10.1364/JOSAB.26.000133


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Abstract

The saturated photorefractive index determines the information storage capacity of a photorefractive crystal. Therefore, it is important to be able to measure this quantity precisely. We report a technique for measuring the saturated amplitude of the photorefractive index grating Δ n 0 with a precision of 2%, by measuring the diffraction efficiency as a function of time. We also report the measurement of the half-growth time τ of the grating. The Δ n 0 and τ are also verified by substitution into the theoretical formula derived from the coupled wave theory. The resulting theoretical prediction is shown to be consistent with the experimental data. The results also show that Δ n 0 is almost linearly proportional to light modulation up to unit light modulation for 0.01% Fe doped Li Nb O 3 , which may be understood from the work of Vaveliuk et al. [Phys. Rev. B 59, 10985 (1999)] work for the nonlinear regime. We will now be able to quantify the photorefractive effect of those crystals for which this method is applicable.

© 2008 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 20, 2008
Revised Manuscript: October 2, 2008
Manuscript Accepted: October 11, 2008
Published: December 19, 2008

Citation
Shon-Fu Chen, Yu-Fong Tseng, and Chien-Chou Chen, "Quantitative measurement for the saturated modulation of photorefractive index gratings in LiNbO3," J. Opt. Soc. Am. B 26, 133-140 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-1-133

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