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Proceedings Paper

The investigation of the effect of recording conditions on grating formation in a novel holographic photopolymer
Author(s): Pengfei Liu; Tao Zhang; Yingying Liu; Qianli Zhai; Shiquan Tao; Xiaojun Wan; Feipeng Wu
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Paper Abstract

Holographic photopolymers become promising materials for future production of holographic devices. And the mechanism of hologram formation in photopolymers has been broadly studied. In this paper we present a simplified model in order to describe the monomer diffusion and photopolymerization. According to this model, the main effect the modulation of refraction index comes from the intensity of recording beams and fringe spacing during recording. So we quantitatively analyzed the effect of recording intensity and fringe spacing on diffraction efficiency, and carried out validating experiments with a novel blue-green sensitized photopolymer. Holographic gratings were recorded with different recording beam intensities and different fringe spacing respectively, and corresponding diffraction efficiency were obtained. By fitting the experimental results to the model, we obtained the material parameters, such as diffusion time constant, polymerization coefficient. The experimental results indicated that a higher recording intensity resulted in a faster growth of grating and lower saturated diffraction efficiency. And saturated diffraction efficiency increased with the increasing of fringe spacing. These agreed well with theoretical expectation. This study improves the understanding of recording process and consequently allows building more accurate holographic components in the photopolymers.

Paper Details

Date Published: 4 January 2008
PDF: 8 pages
Proc. SPIE 6832, Holography and Diffractive Optics III, 68320Y (4 January 2008); doi: 10.1117/12.757386
Show Author Affiliations
Pengfei Liu, Beijing Univ. of Technology (China)
Tao Zhang, Beijing Univ. of Technology (China)
Yingying Liu, Beijing Univ. of Technology (China)
Qianli Zhai, Beijing Univ. of Technology (China)
Shiquan Tao, Beijing Univ. of Technology (China)
Xiaojun Wan, Technical Institute of Physics and Chemistry (China)
Feipeng Wu, Technical Institute of Physics and Chemistry (China)

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

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