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 in a low noise condition when the semiconductor laser is RF-modulated, by driving the semiconductor laser under a conditions where the average optical outpu...

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Bibliographic Details
Main Authors HIRATA SHOJI, AGA KEIGO
Format Patent
LanguageEnglish
Published 17.06.2003
Edition7
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 in a low noise condition when the semiconductor laser is RF-modulated, by driving the semiconductor laser 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. More specifically, RF modulating conditions (frequency, amplitude and waveform) are selected so that the peaks do not enter the range of P*±0.5 mW relative to the practically used average optical output P*, for example.
Bibliography:Application Number: US20000698687