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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 20 — Oct. 15, 1983
  • pp: 3160–3164

Erase rates in photorefractive materials with two photoactive species

George C. Valley  »View Author Affiliations


Applied Optics, Vol. 22, Issue 20, pp. 3160-3164 (1983)
http://dx.doi.org/10.1364/AO.22.003160


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Abstract

Erase rates for uniformly illuminated refractive-index gratings are derived for a model of photorefractivity in which two photoactive ions participate as donors and acceptors. The model leads naturally to decay of gratings at two separate rates. In some conditions the amplitudes of the components that decay at each rate are nearly equal, while the rates are substantially different. These conditions should be readily observable in crystals with two photoactive species. In other conditions, one amplitude greatly exceeds the other or the time constants are nearly equal, and a single rate would be observed. The ratios of the rates and amplitudes are insensitive to erase irradiance but very sensitive to grating period and absorption cross section. Illustrative parameters for Bi12SiO20 suggest that if two photoactive species are present, two decay rates should be observable.

© 1983 Optical Society of America

History
Original Manuscript: March 23, 1983
Published: October 15, 1983

Citation
George C. Valley, "Erase rates in photorefractive materials with two photoactive species," Appl. Opt. 22, 3160-3164 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-20-3160


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References

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