The photorefractive recording dynamics of two-beam coupling in semi-insulating semiconductors by beams with slightly different frequencies are studied theoretically and experimentally. The influences of bulk absorption, Gaussian beam profiles, and experimental geometry on the temporal response are analyzed. These effects act to narrow the bandwidth. Measurement of the material photorefractive time constant is discussed.
[Optical Society of America ]
G. Brost, J. Norman, S. Odoulov, K. Shcherbin, A. Shumelyuk, and V. Taranov, "Gain spectra of beam coupling in photorefractive semiconductors," J. Opt. Soc. Am. B 15, 2083-2091 (1998)