Abstract

We report strong competition of intensities between spontaneously emerging beams (subharmonics) and other diffracted beams in two-wave mixing experiments with two frequency-detuned pump beams in photorefractive bismuth silicon oxide. The measurements show that the onset of subharmonics strongly affects the strength of the fundamental component of the primary grating, which caused the subharmonics in the first place. Suppression of subharmonics by vibration of the crystal increased the diffraction efficiency of the fundamental grating component by more than an order of magnitude.

© 1995 Optical Society of America

Dynamic spatial structure of spontaneous beams in photorefractive bismuth silicon oxide

Preben Buchhave, Sergei Lyuksyutov, Mikhail Vasnetsov, and Carsten Heyde
J. Opt. Soc. Am. B 13(11) 2595-2601 (1996)

Competition between subharmonic and resonating beams for photorefractive gain in bismuth silicon oxide

D. C. Jones and L. Solymar
Opt. Lett. 14(14) 743-744 (1989)

Observation of angularly tilted subharmonic gratings in photorefractive bismuth silicon oxide

Henrik C. Pedersen and Per Michael Johansen
Opt. Lett. 19(18) 1418-1420 (1994)

Nonlinear combinations of gratings in drift-dominated recording in Bi₁₂SiO₂₀

P. E. Andersen, P. M. Petersen, and P. Buchhave
J. Opt. Soc. Am. B 12(12) 2453-2462 (1995)

Photorefractive particle image velocimetry: performance enhancement with bismuth silicon oxide crystals

P. M. Petersen, B. Edvold, P. Buchhave, P. E. Andersen, and A. Marrakchi
Opt. Lett. 17(8) 619-621 (1992)