Abstract

Ferroelectric photorefractive Sn₂P₂S₆ crystals become more sensitive to cw radiation of a Nd³⁺: YAG laser (λ = 1.06 µm) by preexposure with incoherent white light. Space-charge formation and hologram recording are dominated by a diffusionlike charge transport, leading to an ultimate gain factor for transmission gratings that exceeds 6 cm⁻¹ at a laser intensity of approximately 50 W/cm².

© 1996 Optical Society of America

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