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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 17 — Jun. 10, 2011
  • pp: 2500–2507

From the channel model of an InSb-based superresolution optical disc system to impulse response and resolution limits

Dietmar Hepper  »View Author Affiliations


Applied Optics, Vol. 50, Issue 17, pp. 2500-2507 (2011)
http://dx.doi.org/10.1364/AO.50.002500


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Abstract

The signal model of a superresolution optical channel can be an efficient tool for developing components of an associated high-density optical disc system. While the behavior of the laser diode, aperture, lens, and detector are properly described, a general mathematical model of the superresolution disc itself has not yet been available until recently. Different approaches have been made to describe the properties of a mask layer, mainly based on temperature- or power-dependent nonlinear effects. A complete signal-based or phenomenological optical channel model—from non-return-to-zero inverted input to disc readout signal—has recently been developed including the reflectivity of a superresolution disc with InSb used for the mask layer. In this contribution, the model is now extended and applied to a moving disc including a land-and-pit structure, and results are compared with data read from real superresolution discs. Both impulse response and resolution limits are derived and discussed. Thus the model provides a bridge from physical to readout signal properties, which count after all. The presented approach allows judging of the suitability of a mask layer material for storage density enhancement already based on static experiments, i.e., even before developing an associated disc drive.

© 2011 Optical Society of America

OCIS Codes
(160.2900) Materials : Optical storage materials
(210.0210) Optical data storage : Optical data storage
(210.4590) Optical data storage : Optical disks
(210.4810) Optical data storage : Optical storage-recording materials
(220.4830) Optical design and fabrication : Systems design
(350.5340) Other areas of optics : Photothermal effects

ToC Category:
Optical Data Storage

History
Original Manuscript: October 29, 2010
Revised Manuscript: March 18, 2011
Manuscript Accepted: March 25, 2011
Published: June 1, 2011

Citation
Dietmar Hepper, "From the channel model of an InSb-based superresolution optical disc system to impulse response and resolution limits," Appl. Opt. 50, 2500-2507 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-17-2500

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