System and method for light power control in a magneto-optical drive

System and method for light power control in a magneto-optical drive

A method and system for monitoring in real-time changes in operating conditions such as temperature of a magnetic super resolution magneto-optical system which produce variations in aperture size in the media readout layer. The magnitude of a magneto-optical (MO) amplitude signal in a reflected lase...

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1. Verfasser: BELSER KARL A
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Sprache:eng
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INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator BELSER KARL A
description A method and system for monitoring in real-time changes in operating conditions such as temperature of a magnetic super resolution magneto-optical system which produce variations in aperture size in the media readout layer. The magnitude of a magneto-optical (MO) amplitude signal in a reflected laser beam is monitored, normalized by dividing by the laser power, compared to the amplitudes in a table of stored values, and used to derive a laser power feedback signal for controlling the power of the laser to maintain a predetermined aperture size. The MO amplitude signal is derived from patterns representing calibration tones prerecorded onto portions of the data tracks of the MSR media.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title System and method for light power control in a magneto-optical drive
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