Abstract
ABSTRACT This paper presented an experimental study of holographic scattering caused by noise gratings recorded in the PQ-PMMA photopolymers. Dependence of the thickness and temperature on the holographic scattering losses was evaluated. It is found that the scattering losses increased as the thickness an d temperature. According to the relationship between the polymerization rate and exposure, the optimal material parameters thickness 2mm and the temperature 20-30 uC were obtained for avoiding the buildup of strong noise gratings. Key words: Holographic recording material, Holographic scattering. 1. INTRODUCTION The interest in thick photopolymers for holographic information storage has increased recently [1-4] . A material with thicker layers will be able to record more holograms, si nce the dynamic range increases with the thickness of sample [4] . Phenanthrenequinone (PQ) doped poly (methyl methacrylate) (PMMA) photopolymers are potential holographic storage materials due to their excellent ability to form thick mediums that exhibit high diffractive efficiency, neglectable shrinkage and good stability
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