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Acousto-optic parallel read/write head for optical disk data storage.

Robert R McLeod1, Sarah K Walter

  • 1Department of Electrical and Computer Engineering, University of Colorado, Boulder 80309-425, USA. mcleod@colorado.edu

Applied Optics
|September 2, 2006
PubMed
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A novel dynamic acousto-optic grating enables parallel read/write on optical disks. This technology overcomes limitations of previous methods, potentially achieving gigabit per second data transfer rates with simpler drive designs.

Area of Science:

  • Optical data storage technologies
  • Acousto-optic device applications

Background:

  • Traditional optical disk parallel read/write systems utilize static gratings or laser arrays.
  • Existing methods face challenges including coherent crosstalk, spot spacing issues, and tracking limitations.

Purpose of the Study:

  • To introduce a dynamic acousto-optic grating for enhanced parallel optical disk read/write operations.
  • To address the limitations of conventional parallel optical storage techniques.

Main Methods:

  • Implementation of a dynamic acousto-optic grating to generate multiple read/write spots.
  • Demonstration of independent modulation and tracking for each generated spot.
  • Ensuring spot incoherence within a bit period for improved data integrity.

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Main Results:

  • The dynamic acousto-optic grating successfully generates multiple, independently controllable parallel spots.
  • Spots are demonstrated to be incoherent, mitigating crosstalk issues.
  • The system shows potential for high-speed data transfer.

Conclusions:

  • Dynamic acousto-optic gratings offer a viable solution for advanced parallel optical disk read/write.
  • This approach can significantly increase data transfer rates (potentially gigabit per second).
  • The proposed system offers these benefits with only a modest increase in drive complexity.