Wavelength-domain tracking in multiple-beam optical storage systems

Taeyoung Choi; Tom D. Milster; Matthew Lang

doi:10.1117/1.1901656

Wavelength-domain tracking in multiple-beam optical storage systems

Taeyoung Choi, Tom D. Milster, Matthew Lang

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Pages (from-to)	1-9
Number of pages	9
Journal	Optical Engineering
Volume	44
Issue number	5
DOIs	https://doi.org/10.1117/1.1901656
State	Published - May 2005

Keywords

Blazed grating
External cavity diode laser
Multiple-beam lasers
Optical data storage
Tracking error signal
Wavelength-domain tracking

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Engineering

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10.1117/1.1901656

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title = "Wavelength-domain tracking in multiple-beam optical storage systems",

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.",

keywords = "Blazed grating, External cavity diode laser, Multiple-beam lasers, Optical data storage, Tracking error signal, Wavelength-domain tracking",

author = "Taeyoung Choi and Milster, {Tom D.} and Matthew Lang",

note = "Funding Information: This work is supported by contract (NAS2-00117) from the National Aeronautics and Space Administration. We thank Yan Zhang, John Butz, and Warren Bletscher for valuable discussions.",

year = "2005",

month = may,

doi = "10.1117/1.1901656",

language = "English (US)",

volume = "44",

pages = "1--9",

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T1 - Wavelength-domain tracking in multiple-beam optical storage systems

AU - Choi, Taeyoung

AU - Milster, Tom D.

AU - Lang, Matthew

N1 - Funding Information: This work is supported by contract (NAS2-00117) from the National Aeronautics and Space Administration. We thank Yan Zhang, John Butz, and Warren Bletscher for valuable discussions.

PY - 2005/5

Y1 - 2005/5

N2 - 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.

AB - 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.

KW - Blazed grating

KW - External cavity diode laser

KW - Multiple-beam lasers

KW - Optical data storage

KW - Tracking error signal

KW - Wavelength-domain tracking

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Wavelength-domain tracking in multiple-beam optical storage systems

Abstract

Keywords

ASJC Scopus subject areas

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