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bER Characteristics of Super-RENS WORM Disk

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Abstract

We firstly report the bER characteristics of super-resolution near field structure (Super-RENS) write-once read-many (WORM) disk at a blue laser optical system. (Laser wavelength 405nm, numerical aperture 0.85) We used a disk of which carrier-to-noise ratio (CNR) of 75nm is 47dB. We controlled the equalization (EQ) characteristics and used advanced partial-response maximum likelihood (PRML) technique. We obtained bit error rate (bER) of 10-2 level at 50GB and 10-3 level at 40GB with new signal processing techniques. This result shows high feasibility of super-RENS technology for practical use.

© 2005 Optical Society of America

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