Infrared recording of phase gratings is investigated in Sn2P2S6 crystals by radiation of a Nd3+:YAG laser (λ = 1.06 µm) Space-charge formation and hologram recording are dominated by diffusion charge transport. Without an applied electric field, but with preexposure of the sample to incoherent white light, the gain factor exceeds 6 cm-1 at laser intensities above 50 W/cm2.
© 1996 Optical Society of America
Serguey G. Odoulov, Alexander N. Shumelyuk, Ute Hellwig, Romano A. Rupp, and Alexander A. Grabar, "Photorefractive beam coupling in tin hypothiodiphosphate in the near infrared," Opt. Lett. 21, 752-754 (1996)