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Optical Engineering

Spiropyran-doped poly(vinyl carbazole): a new photopolymer recording medium for erasable holography
Author(s): Fatima Ghailane; Gurusamy Manivannan; Roger A. Lessard
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Paper Abstract

The photosensitive organic system of poly(vinyl carbazole) doped with spiropyran is studied for real-time reversible holography. The photoinduced reversible color change between thermally stable and metastable states of spiropyran molecules can modulate the absorption and the refractive index of the spiropyran-doped polymer film. Erasable holograms can be recorded in either stable or metastable states of such films of thickness 10 and 50 μm prepared by a gravity settling method. The grating constant achieved was δ= 0.58 μm, using the 350-nm UV line of a krypton-ion laser. It has been found that write-read-erase cycles can be performed repeatedly. High-efficiency erasable holographic recording at 350 nm has been performed in these films, and a diffraction efficiency greater than 10% has been achieved.

Paper Details

Date Published: 1 February 1995
PDF: 6 pages
Opt. Eng. 34(2) doi: 10.1117/12.194049
Published in: Optical Engineering Volume 34, Issue 2
Show Author Affiliations
Fatima Ghailane, Univ. Laval (Canada)
Gurusamy Manivannan, Univ. Laval (Canada)
Roger A. Lessard, Univ. Laval (Canada)

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