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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 10 — Apr. 1, 2010
  • pp: 1923–1931

Channel model for InSb-based superresolution optical disc system

Dietmar Hepper and Stephan Knappmann  »View Author Affiliations


Applied Optics, Vol. 49, Issue 10, pp. 1923-1931 (2010)
http://dx.doi.org/10.1364/AO.49.001923


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Abstract

A signal model of a superresolution optical channel would 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 is properly described, a general mathematical model of the superresolution disc itself is not yet available. However, different approaches have been made to describe the properties of a mask layer, mainly based on temperature- or power-dependent nonlinear effects [1, 2, 3, 4, 5, 6]. The main problem of the modeling is that temperature-dependent material properties, such as thermal conductivity and refractive indices, are not known or not accurate enough to allow quantitative predictions. Therefore, it could be useful to define a signal-based or phenomenological model that can be calibrated with experimental data. In this contribution, we developed a complete optical channel model—from non-return-to-zero inverted (NRZI) input to disc readout signal—including the reflectivity of a superresolution disc with InSb used for the mask layer. Model parameters are derived from data measured using a static tester. The model is finally applied to a configuration appropriate for a dynamic superresolution optical drive by moving the focused spot relative to the material.

© 2010 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: November 23, 2009
Manuscript Accepted: February 6, 2010
Published: March 26, 2010

Citation
Dietmar Hepper and Stephan Knappmann, "Channel model for InSb-based superresolution optical disc system," Appl. Opt. 49, 1923-1931 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-10-1923


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References

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