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Proceedings Paper

Analysis of a photopolymer sensitized by whole visible light for holographic storage
Author(s): Ruoping Li; Sulian Wang; Hai Lu; Yong Xiao; Daoguang Tang; Mingju Huang
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Paper Abstract

A novel photopolymer based on polyvinyl-alcohol for holographic storage was fabricated. The material with riboflavin (RF), methylene bule (MB), erythrosin B (ErB) as the photosensitizers for holographic storage has a broad absorption spectrum range (more than 500nm). The photopolymer can be sensitized by the whole visible light, and that will improve storage capacity and density of the holographic storage greatly, especially under the short wavelength recording. Photo-induced reaction processes in the photopolymer and phase grating of index modulation for holographic storage were studied. The surface structure of the grating and the images of reaction processes were scanned by SEM (Scanning Electron Microscope). The experimental results are compared with the kinetics theory of the polymerization and they are fitted well. Furthermore, the grating constant can be estimated from grating images which were scanned by SEM. Some holographic characteristics of the photopolymer were analyzed. Using a standard holographic setup, we recorded unslanted diffraction gratings.The material has high maximum diffraction efficiency (≥68%), good sensitivity (≥3.03×10-3 cm2/mJ), and high index modulation (≥4.58 ×10-4) when its tickness is about 300μm. Two dimentional simulate images generated by SLM (Spatial Light Modulator) were stored in the film, and the reconstructed data pages had good fidelity. The results show that the material has a better potential in holographic storage.

Paper Details

Date Published: 4 January 2008
PDF: 9 pages
Proc. SPIE 6832, Holography and Diffractive Optics III, 68322A (4 January 2008); doi: 10.1117/12.756913
Show Author Affiliations
Ruoping Li, Henan Univ. (China)
Sulian Wang, Henan Univ. (China)
Hai Lu, Henan Univ. (China)
Yong Xiao, Henan Univ. (China)
Daoguang Tang, Henan Univ. (China)
Mingju Huang, Henan Univ. (China)


Published in SPIE Proceedings Vol. 6832:
Holography and Diffractive Optics III
Yunlong Sheng; Dahsiung Hsu; Chongxiu Yu, Editor(s)

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