To achieve higher S/N on multi layer recording media, the multi wavelength readout system has been proposed. In this paper, the practical feasibility for independent readout from MO media having a double recording layer is confirmed using two wavelength laser beams. The layer structure of the media is substrate/SiN/TbFeCo/SiN/TbFeCo/PtCo/SiN. It has two TbFeCo recording layers which can store binary data respectively. The wavelength dependence of the Kerr rotation angle is reported. Actual recording experiments have been carried out using 780 nm and 680 nm lasers. Although some interlayer crosstalk still remains, this reproducing method has the advantage of high S/N readout.
Independent readout from double recording layer MO using two wave length laser beams
1997-01-01
156755 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Independent Readout From Double Recording Layer MO Using Two Wave Length Laser Beams
British Library Conference Proceedings | 1997
|WBB2 Parallel readout of Multi-layer Optical Disks Recorded with a Blue Laser
British Library Conference Proceedings | 2001
|British Library Conference Proceedings | 2003
|