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Applied Optics

Applied Optics


  • Vol. 42, Iss. 32 — Nov. 10, 2003
  • pp: 6525–6535

Nonlinear signal-processing model for scalar diffraction in optical recording

Wim M. J. Coene  »View Author Affiliations

Applied Optics, Vol. 42, Issue 32, pp. 6525-6535 (2003)

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A nonlinear signal-processing model is derived for the optical recording channel based on scalar diffraction theory. In this model, the signal waveform is written in closed form as an explicit function of the channel bits that are stored on an optical disk, thereby comprising both linear and nonlinear terms. Its explicit dependence on the channel bits makes this model well suited for signal-processing purposes. With the model it is also convenient to assess the importance of nonlinear contributions to the signal waveform. The model is applied for one-dimensional optical storage as well as for two-dimensional (2D) optical storage in which bits are arranged on a 2D hexagonal lattice. Signal folding is addressed as a typical nonlinear issue in 2D optical storage and can be eliminated by recording of pit marks of sizes considerably smaller than the size of the hexagonal bit cell. Further simplifications of the model with only a limited number of channel parameters are also derived.

© 2003 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.4590) Optical data storage : Optical disks
(210.4770) Optical data storage : Optical recording
(260.1960) Physical optics : Diffraction theory

Original Manuscript: April 11, 2003
Published: November 10, 2003

Wim M. J. Coene, "Nonlinear signal-processing model for scalar diffraction in optical recording," Appl. Opt. 42, 6525-6535 (2003)

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