Write Power Optimizing Method for Multi-Pulse Recording on Magneto-Optical Disk

Hiroshi FUJI  Tomiyuki NUMATA  Mitsuo ISHII  Takeshi YAMAGUCHI  Hideaki SATO  Shigeo TERASHIMA  

IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.8   pp.1160-1165
Publication Date: 1996/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Recording and Memory Technologies
write power control,  pre-write testing,  multi-pulse,  magneto-oprical disk,  ambient temperature,  thermal interference,  

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A laser power optimizing method for multi-pulse recording is described. Multi-pulse recording uses the recording pulse formed by bias part and comb part. To obtain best readout signal characteristics and reduce the time for optimizing, new mark pattern is recorded and then two parts of the recording pulse are individually adjusted by evaluating the detected signals during pre-write testing. At the optimized laser power by this method, a good qualitative eyepattern was obtained. As a result, this new method proves to be suitable for the multi-pulse recording and adapted to various disks with different recording properties.