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Optical Engineering

Wavelength-domain tracking in multiple-beam optical storage systems
Author(s): Taeyoung Choi; Thomas D. Milster; Matthew J. Lang
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Paper Abstract

Wavelength-domain tracking (WDT) is a new concept for application in multiple-beam optical storage systems. Tracking errors caused by use of multiple beams on curved tracks are avoided in WDT systems by optimizing separations of focused beam spots. The control of beam spot separations is accomplished by wavelength tuning of individual laser sources. Feasibility of WDT is demonstrated by implementation and testing of a single-beam WDT tracking servo. Also, a novel method of error signal extraction by low-frequency modulation is proposed.

Paper Details

Date Published: 1 May 2005
PDF: 9 pages
Opt. Eng. 44(5) 055201 doi: 10.1117/1.1901656
Published in: Optical Engineering Volume 44, Issue 5
Show Author Affiliations
Taeyoung Choi, The Univ. of Arizona (United States)
Thomas D. Milster, College of Optical Sciences/The Univ. of Arizona (United States)
Matthew J. Lang, Stanford Univ. (United States)

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