High-Density Magneto-Optical Disk System Using Magnetically Induced Super Resolution

Autor:	Shunji Yoshimura, Masahiko Kaneko, Hideo Owa, Atsushi Fukumoto
Rok vydání:	1992
Předmět:	Materials science business.industry Aperture General Engineering General Physics and Astronomy Laser law.invention Numerical aperture Lens (optics) Wavelength Optics law Bit-length Waveform business Optical disc
Zdroj:	Japanese Journal of Applied Physics. 31:576
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.31.576
Popis:	Magnetically induced super resolution (MSR) is a new technology developed by us. It more than doubles the readout resolution limit of a conventional optical disk system without shortening the laser wavelength or increasing the numerical aperture (N.A.) of the objective lens. We examined the characteristics of the readout signals of an MSR-by-RAD (rear aperture detection) disk and obtained a high C/N of more than 49 dB and good stability of the edge position at a mark length of 0.4 µm. We investigated the high-density MO disk system using the MSR-by-RAD disk. Owing to optimization of the writing process and waveform equalization, the system achieved a byte error rate of less than 10-4 at a bit length of 0.3 µm. This bit length corresponds to a linear density more than three times higher than that of the conventional 130-mm MO disk system of the ISO standard.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d5b6d47ca7d3b40c9e2ecaf30ac03d8 https://doi.org/10.1143/jjap.31.576 Zobrazit plný text záznamu