Novel methylene-blue-sensitized photopolymers for holographic recording: a comparison

Mythili Ushamani; K. Sreekumar; C. Sudha Kartha; Rani Joseph

doi:10.1117/12.537762

29 June 2004 Novel methylene-blue-sensitized photopolymers for holographic recording: a comparison

Mythili Ushamani, K. Sreekumar, C. Sudha Kartha, Rani Joseph

Proceedings Volume 5290, Practical Holography XVIII: Materials and Applications; (2004) https://doi.org/10.1117/12.537762
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

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.

Citation Download Citation

Mythili Ushamani, K. Sreekumar, C. Sudha Kartha, and Rani Joseph "Novel methylene-blue-sensitized photopolymers for holographic recording: a comparison", Proc. SPIE 5290, Practical Holography XVIII: Materials and Applications, (29 June 2004); https://doi.org/10.1117/12.537762

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