1. READ/WRITE CHARACTERISTICS OF ZERO FIELD MAMMOS
- Author
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Hiroyuki Awano, Masaki Sekine, H. Noguchi, Osamu Ishizaki, Noboru Mamiya, Katsusuke Shimazaki, Manabu Tani, N. Takagi, H. Watanabe, Hitoshi Terasaki, and Kenichiro Mitani
- Subjects
Recording density ,Optics ,Materials science ,Zero field ,Laser diode ,business.industry ,law ,Incident beam ,Polarization (waves) ,Groove width ,business ,Magneto optical ,law.invention - Abstract
We have developed a magneto optical disk system, having the recording density of 7.1 Gbit/in2, by using zero-field type MAMMOS technology and an in-groove structured disk with a 635 nm laser diode and a 0.60 N.A.objective lens. We demonstrated that the system has enough margins for read/write powers, tilt, detrack anddefocus. On the other hand, the dependence of polarization direction of the incident beam on read/write characteristics was a problem, but was solved by optimizing the groove width.
- Published
- 2002
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