Simplified Transfer Function of Write Compensation for Phase-Change Optical Disks

A simplified transfer function for write compensation is given by the inverse function of the cooling transfer function of a phase-change optical disk. The areas at a phase-change recording layer irradiated with an optical beam melt and change to marks. The marks are formed when the area is rapidly...

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Veröffentlicht in:Japanese Journal of Applied Physics 2013-09, Vol.52 (9), p.09LE02-09LE02-4
Hauptverfasser: Tanabe, Takaya, Sakamoto, Kotaro, Okubo, Kohei
Format: Artikel
Sprache:eng
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Zusammenfassung:A simplified transfer function for write compensation is given by the inverse function of the cooling transfer function of a phase-change optical disk. The areas at a phase-change recording layer irradiated with an optical beam melt and change to marks. The marks are formed when the area is rapidly cooled; however, the marks disappear in a slowly cooled situation. Thus, the cooling process was considered essential for the mark formation on a phase-change optical disk. Therefore, the transfer function of the mark formation combined a heating component before mark formation with that after mark formation using a lag element. It was also found that the transfer function for write compensation could be achieved using a two-stage pulse train method. Experimental results showed that long marks were recorded by the pulse train method with the same frequency characteristic as our theoretical analysis.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.52.09LE02