Abstract

Polymer photorefractive devices are formed by sandwiching an electro-optic dye/photoconducting polymer composite between two indium tin oxide coated glass substrates Holographic information may be written in the material using two coherent optical beams. Device diffraction efficiencies of 60 %, holographic growth times of a few hundred milliseconds and two beam coupling gain coefficient of greater than 200 cm^-1 have been reported^[1]. High gain and low manufacturing costs of polymer devices are clear advantages over photorefractive crystals, although typical holographic grating risetimes of a few hundred milliseconds are restrictive.

© 1998 IEEE