Abstract

We describe the application of partial-response (PR) signaling in rewritable phase-change optical data storage. No electronic filter is necessary to shape the readout signal to a certain PR target. A PR-like waveform at the output of the read channel is directly achieved by optical recording. A genetic algorithm is used to optimize the parameters for writing and therefore to minimize the difference between the actual readout signal and the ideal PR waveform. With a laser wavelength of 0.66 µm and an objective lens with a numerical aperture of 0.6, four linear densities were examined: 0.4, 0.3, 0.25, and 0.2 µm/bit (without modulation). Results showed that the linear density of 0.25 µm/bit can be realized on a rewritable digital-versatile disk.

© 2002 Optical Society of America

Evaluation of partial-response maximum-likelihood detection for phase-change optical data storage

Chubing Peng and M. Mansuripur
Appl. Opt. 38(20) 4394-4405 (1999)

Partial-response equalization in magneto-optical disk readout: a theoretical investigation

Lu Cheng, M. Mansuripur, and D. G. Howe
Appl. Opt. 34(23) 5153-5166 (1995)

Superresolution near-field readout in phase-change optical disk data storage

Chubing Peng
Appl. Opt. 40(23) 3922-3931 (2001)

Thermal properties and crystallization dynamics of a phase-change alloy for write-once optical data storage

Gerd M. Fischer, Brian Medower, Robert Revay, and Masud Mansuripur
Appl. Opt. 41(10) 1998-2007 (2002)

Polarization dependence of thermal behavior in rewritable phase-change optical recording media

Chubing Peng
Appl. Opt. 41(2) 379-387 (2002)