Wavelength-domain tracking in multiple-beam optical storage systems

被引：1
|
作者：
Choi, TY [1 ]
Milster, TD [1 ]
Lang, M [1 ]
机构：
[1] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA
来源：
OPTICAL DATA STORAGE 2004 | 2004年 / 5380卷
关键词：
wavelength-domain tracking (WDT); tracking error signal (TES); external cavity diode laser (ECDL); blazed grating; optical data storage; multiple-beam lasers;
D O I：
10.1117/12.557068
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Wavelength-domain tracking 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.
引用
收藏
页码：197 / 208
页数：12
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