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Patent AT-E401649-T1: [Translated] INITIALIZATION OF A PHASE CHANGE TYPE OPTICAL RECORDING MEDIUM

Published by National Center for Biotechnology Information (NCBI) | U.S. Department of Health & Human Services | Catalog Last Checked: September 10, 2026 at 07:52 PM | Dataset Last Updated: September 06, 2025
A method of initializing a phase-change optical information recording medium is provided, using an optical system incorporating a semiconductor laser device. The laser device is characterized by a specified spatial power distribution. In a spatial distribution of the laser power focused on the recording medium in the direction perpendicular to guide tracks, the laser device preferably has an average smaller in both end regions of the spatial distribution, which have each 10% of the width at half maximum of the distribution, than the average in the center region of the full width at half maximum of the distribution.

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