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Applied Optics

Applied Optics


  • Vol. 43, Iss. 25 — Sep. 1, 2004
  • pp: 4896–4901

Comparison of defocusing and fractional Fourier transform in spectroholographic storage

Zhuo Wang, Guofan Jin, Qingsheng He, and Minxian Wu  »View Author Affiliations

Applied Optics, Vol. 43, Issue 25, pp. 4896-4901 (2004)

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In spectroholographic storage systems the defocusing method is often used for spectrum uniformity and quality improvement of recorded information. The same purpose is served by the fractional Fourier transform (FRFT) storage system. To simplify the numerical analysis, we derive the expressions of the Fraunhofer spectrum and the reconstructed image at the detected plane (CCD) for both cases instead of using the Fresnel spectrum and the FRFT spectrum. The recording aperture, spectrum uniformity, and reconstructed information of both systems are investigated. A numerical comparison is also presented.

© 2004 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories

Original Manuscript: January 9, 2004
Revised Manuscript: May 17, 2004
Manuscript Accepted: May 20, 2004
Published: September 1, 2004

Zhuo Wang, Guofan Jin, Qingsheng He, and Minxian Wu, "Comparison of defocusing and fractional Fourier transform in spectroholographic storage," Appl. Opt. 43, 4896-4901 (2004)

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