SEMICONDUCTOR LASER DRIVING METHOD AND OPTICAL DISC APPARATUS

A SEMICONDUCTOR LASER DRIVING METHOD, WHICH IS USABLE IN AN OPTICAL DISC APPARATUS, FOR EXAMPLE, MAKES IT POSSIBLE TO USE A SEMICONDUCTOR LASER (1) IN A LOW NOISE CONDITION WHEN THE SEMICONDUCTOR LASER (1) IS RF-MODULATED, BY DRIVING THE SEMICONDUCTOR LASER (1) UNDER A CONDITIONS WHERE THE AVERAGE O...

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Bibliographic Details
Main Authors SHOJI HIRATA, KEIGO AGA
Format Patent
LanguageEnglish
Published 29.12.2006
Subjects
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
TRANSMISSION
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Summary:A SEMICONDUCTOR LASER DRIVING METHOD, WHICH IS USABLE IN AN OPTICAL DISC APPARATUS, FOR EXAMPLE, MAKES IT POSSIBLE TO USE A SEMICONDUCTOR LASER (1) IN A LOW NOISE CONDITION WHEN THE SEMICONDUCTOR LASER (1) IS RF-MODULATED, BY DRIVING THE SEMICONDUCTOR LASER (1) UNDER A CONDITIONS WHERE THE AVERAGE OPTICAL OUTPUT IS OFFSET FROM PEAKS APPEARING IN A CURVE REPRESENTING THE RELATIVE INTENSITY OF NOISE TO AVERAGE OPTICAL OUTPUT CHARACTERISTICS OF THE SEMICONDUCTOR LASER (1). MORE SPECIFICALLY, RF MODULATING CONDITIONS (FREQUENCY, AMPLITUDE AND WAVEFORM) ARE SELECTED SO THAT THE PEAKS DO ENTER THE RANGE OF P*±O.5 MW RELATIVE TO THE PRACTICALLY USED AVERAGE OPTICAL OUTPUT, FOR EXAMPLE. (FIGURES 2 AND 5)
Bibliography:Application Number: MY2004PI05137