Polymer matrices like PVC and a blend of PVA/PAA is introduced as new holographic media that cause
red sensitivity with methylene blue. Unlike methylene blue sensitized polymers like PVA, PMMA, gelatin etc, the
change of state occurring for methylene blue on laser irradiation on PVC matrix was found to be permanent. No
recovery of dye on the irradiated spot was observed on storage. The outstanding properties of this material are its
excellent optical clarity, insensitive to humidity, economical, ease of fabrication, absence of dark room storage etc. The
recovery of dye in conventional MBPVA matrix can be delayed by blending PVA with PAA. Optimization of the ratio
of PVA/PAA, the sensitizer concentration, pH, energy, diffraction efficiency measurements etc are done. pH is found to
have a great influence on the recovery of the dye in this matrix. The effect of monomers in improving the diffraction
efficiency on these dye doped polymer system is also evaluated. A comparative study is done on these polymer matrices
and holographic gratings were recorded on these films from a He- Ne laser operating at 632.8 nm.
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