Overwriting On A Magneto-Optical Disk With Magnetic Triple Layers By Means Of The Light Intensity Modulation Method

K. Aratani; M. Kaneko; Y. Mutoh; K. Watanabe; H. Makino

doi:10.1117/12.952769

19 May 1989 Overwriting On A Magneto-Optical Disk With Magnetic Triple Layers By Means Of The Light Intensity Modulation Method

K. Aratani, M. Kaneko, Y. Mutoh, K. Watanabe, H. Makino

Author Affiliations +

Proceedings Volume 1078, Optical Data Storage Topical Meeting; (1989) https://doi.org/10.1117/12.952769
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Direct overwriting on a magnetic triple-layer magneto-optical disk has been performed by modulating the light intensity. Previously, direct overwriting had be performed only on a double-layer disk. The initializing field was reduced to 3.5 kOe for the triple-layer disk, compared with more than 5 kOe for a double-layer disk. A high C/N ratio of 50 dB was obtained for an overwritten bit length of 0.75 Am without any residual former signal. Margins of the light power for bits to be overwritten at an acceptable error rate are more than ±24 % for both the high and the low light intensity. The magnetic triple-layer disk is a promising medium for direct overwriting by light intensity modulation.

Citation Download Citation

K. Aratani, M. Kaneko, Y. Mutoh, K. Watanabe, and H. Makino "Overwriting On A Magneto-Optical Disk With Magnetic Triple Layers By Means Of The Light Intensity Modulation Method", Proc. SPIE 1078, Optical Data Storage Topical Meeting, (19 May 1989); https://doi.org/10.1117/12.952769

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