Recording characteristics of high-density thin optical disk using near-field optical recording |
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Authors: | Daiichi Koide Takeshi Kajiyama Ryuji Sato Haruki Tokumaru Yoshimichi Takano |
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Institution: | 1. Science and Technology Research Laboratories, NHK (Japan Broadcasting Corporation), Setagaya, Tokyo, 157-8510, Japan
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Abstract: | We report on the recording characteristics of a near-field optical recording thin optical disk (NFR-TOD). We proposed a new cooling-less-type write strategy for recording, applied it to the NFR-TOD experimental system, and also applied a partial response maximum likelihood (PRML) signal processing, which was evaluated and optimized the PR coefficient for playback signals of the prototype NFR-TOD. The NFR-TOD has a track pitch of 160 nm and improved recording characteristics. The experimental results of the prototype NFR-TOD and the system indicate sufficiently low bit error rates (bERs) for recorded data at a fourfold higher recording density than the current Blu-ray disk. |
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