Abstract

Photorefractive gratings are generated in a BSO crystal by the interference of two 25-psec pulses at 532 nm. The grating is analyzed by diffraction of a third pulse or a weak cw argon laser, which permits a continuous monitoring of its evolution from picoseconds to milliseconds. The grating builds up in two steps; their relative contributions vary strongly with fluence. This behavior is explained by means of a band transport model with shallow traps. Values of mobility, lifetimes, and diffusion lengths of carriers are derived and compared with those obtained in experiments conducted with low-power lasers; the values show a striking continuity from cw to picosecond regimes.

© 1990 Optical Society of America

Optical measurements of charge-carrier mobilities in photorefractive sillenite crystals

G. Pauliat, A. Villing, J. C. Launay, and G. Roosen
J. Opt. Soc. Am. B 7(8) 1481-1486 (1990)

Formation, decay, and erasure of photorefractive gratings written in barium titanate by picosecond pulses

Arthur L. Smirl, K. Bohnert, George C. Valley, Ruth Ann Mullen, and Thomas F. Boggess
J. Opt. Soc. Am. B 6(4) 606-615 (1989)

Photorefractive effects induced by picosecond light pulses in reduced KNbO₃

I. Biaggio, M. Zgonik, and P. Günter
J. Opt. Soc. Am. B 9(8) 1480-1487 (1992)

Gallium-induced inhibition of the photorefractive properties of sillenite crystals

C. Coya, C. Zaldo, V. V. Volkov, A. V. Egorysheva, K. Polgár, and A. Péter
J. Opt. Soc. Am. B 13(5) 908-915 (1996)

Theory of complementary holograms arising from electron–hole transport in photorefractive media

M. C. Bashaw, T.-P. Ma, R. C. Barker, S. Mroczkowski, and R. R. Dube
J. Opt. Soc. Am. B 7(12) 2329-2338 (1990)