Convertible holograms in CaF2 crystals with color centers

Alexandr E. Angervaks; Aleksandr S. Shcheulin; Aleksandr I. Ryskin

doi:10.1117/12.2017160

8 May 2013 Convertible holograms in CaF₂ crystals with color centers

Alexandr E. Angervaks, Aleksandr S. Shcheulin, Aleksandr I. Ryskin

Proceedings Volume 8776, Holography: Advances and Modern Trends III; 877604 (2013) https://doi.org/10.1117/12.2017160
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

When recording hologram in ionic CaF₂ crystal with color centers, the center conversion is accompanied with their spatial redistribution. The peculiar diffusion-drift mechanism of the recording is responsible for the extremely high hologram stability to both heating and illumination of the sample with a hologram by non-coherent radiation. However such photo-thermal treatment of the sample results in partial or total transformation of the center type and modification in their space distribution. Thus, keeping the hologram, such treatment influences its character of diffraction response, diffraction efficiency and profile. This work describes the mechanism and the character of these changes. It is shown that photo-thermal treatment can be used for fabrication of thick (up to 10 mm thickness) high stable holograms when reading out both in visible and infrared ranges of the spectrum.

Citation Download Citation

Alexandr E. Angervaks, Aleksandr S. Shcheulin, and Aleksandr I. Ryskin "Convertible holograms in CaF₂ crystals with color centers", Proc. SPIE 8776, Holography: Advances and Modern Trends III, 877604 (8 May 2013); https://doi.org/10.1117/12.2017160

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