The characteristics of a new high-gain photorefractive polymer composite with a PNP chromophore are investigated. Competition between beam fanning and two-wave coupling (TWC) is predicted and verified experimentally. The intensity dependence of TWC gain is studied. Higher diffraction order and forward phase conjugation in a TWC geometry are observed and explained.
© 1999 Optical Society of America
K. Matsushita, P. P. Banerjee, S. Ozaki, and D. Miyazaki, "Multiwave coupling in a high-gain photorefractive polymer," Opt. Lett. 24, 593-595 (1999)