Photorefractive subharmonics - a beam-coupling effect?

摘要

Using the so-called ac field technique, we investigate experimentally the influence of optical beam coupling on the generation of subharmonic gratings in a photorefractive sillenite crystal. By the use of two different recording configurations, we are able to distinguish between effects caused by material nonlinearities and effects caused by optical beam coupling. (C) 1998 Optical Society of America [S0740-3224(98)00305-1]. [References: 19]