Optics and Spectroscopy

, Volume 113, Issue 6, pp 638–642 | Cite as

Dependence of the profile of a hologram recorded on color centers in a CaF2 crystal on the type of hologram-forming centers

  • A. S. Shcheulin
  • A. E. Angervaks
  • A. V. Veniaminov
  • V. V. Zakharov
  • A. I. Ryskin
Holography

Abstract

A hologram recorded in a CaF2 crystal by modulating the concentration of simple centers (F, M, R, and N) and highly aggregated (mainly colloidal) color centers has been exposed to incoherent 365-nm light to a dose of about 4000 J/cm2 at a temperature of 80°C. As a result of this exposure, the color centers were almost completely transformed into quasi-colloidal centers. The hologram was retained, and its diffraction efficiency increased; the intensity and number of observed diffraction orders increased as well. Analysis of the angular dependences of the diffraction response made it possible to construct a spatial profile of the hologram, which turned out to be much narrower in comparison with the initial-hologram profile; both profiles differ from a sinusoidal one. The hologram’s stability to such a large exposure to incoherent light at an elevated temperature is related to the peculiar diffusion-drift mechanism of hologram recording on color centers in ionic crystals.

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • A. S. Shcheulin
    • 1
  • A. E. Angervaks
    • 1
  • A. V. Veniaminov
    • 1
  • V. V. Zakharov
    • 1
  • A. I. Ryskin
    • 1
  1. 1.St. Petersburg State University of Information Technologies, Mechanics, and OpticsSt. PetersburgRussia

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