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Laser device driven by a periodic waveform optimized for reducing laser noise
Laser device driven by a periodic waveform optimized for reducing laser noise
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机译:由周期性波形驱动的激光设备经过优化,可降低激光噪声
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摘要
The optical information recording and reproducing method and apparatus include a method for controlling a high frequency pulse current for driving a semiconductor laser device by which noise due to returning laser light is hardly produced, and an apparatus for increasing access speed owing to decrease in the weight of an optical pick-up movable part. Loser noise is suppressed satisfactorily by detecting the position of the optical pick-up movable part in a split optical system by means of a scale, and generating a pulse current for modulating the laser having a frequency optimum for reducing the laser noise to drive the semiconductor laser device.
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