Abstract

The first experimental verification to the authors’ knowledge of efficient two-step recording in a photorefractive and piezoelectric crystal of La3Ga5SiO14:Pr3+ with cw laser light I<20 W/cm2 is reported. We found nonlinear behavior of the photorefractive sensitivity and photovoltaic current, indicating that the excitation process is connected to excitation of 4f2 electrons of the Pr3+ dopant through an intermediate level to the conduction band. This two-step nature of the photorefractive effect makes the crystal an exciting new candidate for applications in holographic storage.

© 1998 Optical Society of America

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