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17 September 2002 Design optimization of dual-layer DVD-ROM disk
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The use of multiple data layers has been an effective way to increase the capacity of an optical disk. In particular, the dual-layer approach has been used successfully to double the capacity of a DVD-ROM disk as compared to its single-layer counterpart. In the design of such a dual-layer disk, the existence of the crosstalks between the signals received from the two data layers is an important system design constraint. In this paper, the optimization of the crosstalks is investigated by treating the reflectance of the semi-reflective layer and the reflective layer as free design parameters. It is shown that it is not possible to simultaneously minimize the crosstalks that arise, respectively, from reading the first data layer and from reading the second data layer. On the other hand, it is shown that it is possible to simultaneously equalize the crosstalks and the signal-to-noise ratios by an appropriate choice of the reflectance of the semi-reflective layer and the reflective layer. Numerical results obtained from this study agree well with experimental results.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tuan-Kay Lim "Design optimization of dual-layer DVD-ROM disk", Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002);


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