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Conferences > ISOM > 1996 > OTuB > OTuB.19

Method for normalizing the write laser power of magneto-optical disk drives by using a calibration disk

Shigeji Hara, Fumiaki Yamada, Shuji Sasaki, and Kan-ichi Oishi

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Abstract

Normalization of write laser power is important for facilitating the device independent use of optical disks in optical disk drives produced by different manufacturers. Saturation curves measured under various write conditions are well correlated in shape after being normalized by their average P80 value(1). P80 is defined as the laser power that causes a signal amplitude equal to 80% of the maximum amplitude of a saturation curve when 3T signals are recorded as a function of laser power. This shows the possibility of using the P80 of a calibration disk as a reference value for the laser power of optical disk drives.

© 1996 Optical Society of America

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