Image amplification and beam fanning in a photorefractive medium are described by the multivariable Langevin equations when the random volume scattering is included owing to the inhomogeneities and/or defects distributed throughout the medium. The effects of the random volume scattering on the image amplification and the beam fanning are studied analytically in the undepleted-pump approximation and numerically, and they are compared with the surface scattering.
[Optical Society of America ]
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(190.5890) Nonlinear optics : Scattering, stimulated
(190.7070) Nonlinear optics : Two-wave mixing
Ping Xie, Peng-Ye Wang, Jian-Hua Dai, and Hong-jun Zhang, "Effect of random volume scattering on image amplification and beam fanning in photorefractive materials," J. Opt. Soc. Am. B 15, 1889-1894 (1998)