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Two-Dimensional Optical Storage

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Abstract

Within the framework of the European IST-project called “TwoDOS”, we are currently developing a new concept for optical storage, in which the information written on the disc fundamentally has a two-dimensional character. The aim is to realize an increase over the current 3rd generation of optical storage (Blu-Ray Disc, BD, with λ=405 nm and NA=0.85) with a factor of two in data density and a factor of 10 in data rate. The new concept is based on innovative two-dimensional channel coding and advanced signal processing, in combination with a read-channel consisting of a multi-spot light path realizing a parallel read-out, where each spot has BD characteristics. Our evaluation is currently being performed with binary modulation on mastered ROM discs.

© 2003 Optical Society of America

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