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Proceedings Paper

Wavelength and defocus margins of the collinear holographic storage system
Author(s): Jianhua Li; Liangcai Cao; Huarong Gu; Xiaodi Tan; Qingsheng He; Guofan Jin
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Paper Abstract

The wavelength and defocus margins for collinear holographic data storage system are theoretically analyzed based on the first Born approximation and the scalar diffraction theory. Explicit expressions for the decay of diffracted signal in the center of the detector plane with the shift of the reading wavelength and with the defocus of the disc are presented. The expressions predict that the defocus margin is independent of the media thickness while a thicker disc leads to a narrower wavelength margin. Simulation results show that the wavelength margin of collinear holographic scheme is larger than that of the conventional 2-axis holographic scheme. The influences of the properties of reference pattern on both margins are also discussed.

Paper Details

Date Published: 2 December 2010
PDF: 8 pages
Proc. SPIE 7851, Information Optics and Optical Data Storage, 785115 (2 December 2010); doi: 10.1117/12.870349
Show Author Affiliations
Jianhua Li, Tsinghua Univ. (China)
Liangcai Cao, Tsinghua Univ. (China)
Huarong Gu, Tsinghua Univ. (China)
Xiaodi Tan, Sony Corp. (Japan)
Qingsheng He, Tsinghua Univ. (China)
Guofan Jin, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 7851:
Information Optics and Optical Data Storage
Feijun Song; Shiquan Tao; Francis T. S. Yu; Suganda Jutamulia; Kees A. Schouhamer Immink; Keiji Shono, Editor(s)

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