Partial-response signaling for phase-change optical data storage without electronic equalization

Chubing Peng, Masud Mansuripur

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)3479-3486
Number of pages8
JournalApplied optics
Issue number17
StatePublished - Jun 10 2002

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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