Year: 1995
Type: article
Abstract: We have analyzed the jitter characteristics and disk tilt tolerance of an MO system capable of 7 times higher areal density MO recording for various paris of bit length and track pitch using a green light source. The minimum jitter of 8% with no disk tilt was obtained at a bit length of 0.3 μm and a track pitch of 0.75 μm. The disk tilt dependence of the jitter was measured for each of the above conditions. The disk tilt margins under any conditions were small compared to that of conventional MO disk systems. The tilt margin of more than ±0.5 deg can be ensured with the aid of a two dimensional skew servo system. Based on these results the advantage of a blue light source is discussed. Using our disk optimized for green light, the SNR estimated for blue light is 2 dB smaller than that measured for green light. The influence of the SNR degradation upon jitter is not very large. We expect that the combination of a blue light source and a low NA objective lens will enlarge not only the disk tilt tolerance but also other tolerances limited by aberrations.
Authors: A. FUKUMOTO, Y. TAKESHITA, I. ICHIMURA
Institution: Sony Corporation (United States)
Language: English
Subfield: Computer Networks and Communications
Field: Computer Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2004106429