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Proceedings Paper

Novel read-out technology for multi-layer disc using polarization device
Author(s): Tetsuya Ogata; Takayuki Kawashima
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Paper Abstract

When the multi-layer disc is read by a normal optical pickup, the signal light that is reflected in the read-out layer contains stray light from the adjacent recording layers, which is called the layer cross-talk (LCT). To reduce the LCT, we developed a new optical pickup that has a segmented wave-plate made of an auto-cloned photonic crystal. It has some advantages of perfect removal of LCT, detection of the high efficiency of the signal light, and the miniaturization of the optical pickup. In addition, by using this optical pickup, we confirmed the improvement of the signal performance, using a HD DVD dual-layer disc that has a thin spacer layer thickness, to increase the LCT.

Paper Details

Date Published: 22 June 2006
PDF: 8 pages
Proc. SPIE 6282, Optical Data Storage 2006, 62820B (22 June 2006); doi: 10.1117/12.685170
Show Author Affiliations
Tetsuya Ogata, Ricoh Co. Ltd. (Japan)
Takayuki Kawashima, Photonic Lattice Inc. (Japan)


Published in SPIE Proceedings Vol. 6282:
Optical Data Storage 2006
Ryuichi Katayama; Tuviah E. Schlesinger, Editor(s)

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