Abstract

In this paper we present a holographic film made from methyl violet and polyvinyl alcohol (PVA). The significance of this material is that the thermally stable state is colored,^1,2 allowing HeNe lasers to be used for grating formation in the bleaching mode. Only a very few photochromic materials have exhibited response to HeNe, and methyl violet exhibits diffraction efficiencies ≈ 2%.

© 1993 Optical Society of America