Signal Simulation of 25 Gbytes Read-Only Optical Disk System using a High Numerical Aperture Objective Lens

Signal Simulation of 25 Gbytes Read-Only Optical Disk System using a High Numerical Aperture Objective Lens

We have already developed and reported the high-definition digital-versatile-disk read-only-memory system of capacity 15 Gbytes using a blue laser and new signal processing technique. On the other hand, a high numerical-aperture system has been reported of numerical-aperture 0.85 and cover layer thi...

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Veröffentlicht in:Japanese Journal of Applied Physics 2001-03, Vol.40 (3S), p.1536
Hauptverfasser: Yanagisawa, Takuma, Nomoto, Takayuki, Ohsawa, Seiichi, Yokogawa, Fumihiko
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container_issue 3S
container_start_page 1536
container_title Japanese Journal of Applied Physics
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creator Yanagisawa, Takuma
Nomoto, Takayuki
Ohsawa, Seiichi
Yokogawa, Fumihiko
description We have already developed and reported the high-definition digital-versatile-disk read-only-memory system of capacity 15 Gbytes using a blue laser and new signal processing technique. On the other hand, a high numerical-aperture system has been reported of numerical-aperture 0.85 and cover layer thickness 0.1 mm. In this paper, we examined the increase in capacity on application of our signal processing technique to the high numerical-aperture system using computer simulation. As a result, we found that a 25 Gbytes read-only-memory disk system had sufficient system margins on applying the limit equalizer and the adaptive tangential equalizer. Furthermore, if the crosstalk canceler is applied, we may achieve a system of capacity larger than 25 Gbytes.
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title Signal Simulation of 25 Gbytes Read-Only Optical Disk System using a High Numerical Aperture Objective Lens
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