Abstract

Infrared holographic recording in a two-step process is demonstrated in stoichiometric iron-doped lithium tantalate crystals. Through absorption of two intersecting infrared pulses ($\lambda =1064 \mathrm{nm}$) a temperature grating and thus a modulated pyroelectric field build up. Free electrons, excited by homogeneous light of a shorter wavelength ($\lambda =532 \mathrm{nm}$) drift in this field, and a phase hologram is stored that can be read nondestructively. The change in refractive index depends mainly on the absorption coefficient at the wavelength of the recording light and on the intensity of the infrared light. The proposed method may be extended to telecommunication wavelengths by choice of suitable dopants.

© 2003 Optical Society of America

Nonvolatile holographic storage in iron-doped lithium tantalate with continuous-wave laser light

J. Imbrock, D. Kip, and E. Krätzig
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Temperature-dependent Sellmeier equation for the refractive index of stoichiometric lithium tantalate

Ariel Bruner, David Eger, Moshe B. Oron, Pinhas Blau, Moti Katz, and Shlomo Ruschin
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