Abstract
We compare spectral and holographic characteristics of a novel material designed for manufacture of photothermorefractive (PTR) glass. The parameters of holograms recorded in classical and modified PTR glass are confronted. It is shown that unlike the classical PTR glass, the modified PTR glass does not have an additional absorption band in the blue-green spectral region. This allows one to record purely phase holograms in the visible spectral range. The amplitude of modulation of the first harmonic in the refraction factor for the modified photothermorefractive glass is twice as high as that within the classical approach.
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