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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 20 — Jul. 10, 1998
  • pp: 4425–4432

Measurements and simulations of differential phase-tracking signals in optical disk data storage

Chubing Peng, Wei-Hung Yeh, and M. Mansuripur  »View Author Affiliations


Applied Optics, Vol. 37, Issue 20, pp. 4425-4432 (1998)
http://dx.doi.org/10.1364/AO.37.004425


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Abstract

The tracking-error signal generated in differential phase detection (DPD) is theoretically analyzed and numerically simulated. Experimental measurements of the DPD signal versus the tracking offset obtained on compact read-only and phase-change disks are also reported. The signal is sensitive to the geometry of the marks, intersymbol interference along the track, and cross-track cross talk. A characteristic parameter is introduced to relate the DPD signal to the reflectivities of the mark and the spacer. For read-only disks such as CD-ROM and DVD-ROM, the magnitude of the DPD signal does not seem to depend on the reflectivity of the disks, nor does it depend on the pit depth. As for the influence of the various aberrations on the DPD signal, coma in the cross-track direction is shown to give rise to significant tracking offset, whereas defocus and spherical aberrations reduce the magnitude of the DPD signal appreciably.

© 1998 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.4590) Optical data storage : Optical disks
(210.4810) Optical data storage : Optical storage-recording materials

History
Original Manuscript: December 5, 1997
Revised Manuscript: March 23, 1998
Published: July 10, 1998

Citation
Chubing Peng, Wei-Hung Yeh, and M. Mansuripur, "Measurements and simulations of differential phase-tracking signals in optical disk data storage," Appl. Opt. 37, 4425-4432 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-20-4425

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