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Proceedings Paper

Study for Bragg detuning effect and asymmetry of diffraction efficiency on the transmission and the reflection hologram
Author(s): Yun-Young Kwon; Kun-Yul Kim; Joo-Youn Park; Jong-Yong Park
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Paper Abstract

Bragg detuning effect and asymmetry of diffraction efficiency are serious problems if a photopolymer is used for the recording material of holographic storage. The critical reasons are bulk refractive index change and shrinkage of the recording materials. Until now, analyzing these effects bas been based on the K-sphere and the transmission hologram only or the reflection hologram only. A modified numerical model has been established explaining both holograms together and its results are well matched with experimental results. Bulk refractive index change causes + directional angle detuning on the transmission and reflection holograms. Material shrinkage leads to + directional angle detuning on the transmission hologram, but - directional angle detuning on the reflection hologram. The measured data are matched with Bragg detuning effect on the transmission and the reflection holograms with the proper the bulk refractive index change and shrinkage ratio of the material. For the asymmetry of diffraction efficiency, attenuated grating of material has also been considered. And asymmetries are reproduced on both holograms using absorption coefficient of attenuated grating.

Paper Details

Date Published: 20 February 2007
PDF: 10 pages
Proc. SPIE 6488, Practical Holography XXI: Materials and Applications, 648809 (20 February 2007); doi: 10.1117/12.704567
Show Author Affiliations
Yun-Young Kwon, Daewoo Electronics (South Korea)
Kun-Yul Kim, Daewoo Electronics (South Korea)
Joo-Youn Park, Daewoo Electronics (South Korea)
Jong-Yong Park, Hanyang Univ. (South Korea)


Published in SPIE Proceedings Vol. 6488:
Practical Holography XXI: Materials and Applications
Roger A. Lessard; Hans I. Bjelkhagen, Editor(s)

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