OPTICAL BEAM OUTPUT CONTROL UNIT, OPTICAL PICKUP SYSTEM, OPTICAL BEAM EMITTING CONTROL METHOD, OPTICAL BEAM EMITTING CONTROL PROGRAM AND RECORDING MEDIUM RECORDED WITH IT

摘要

PPROBLEM TO BE SOLVED: To provide an optical pickup system which can easily and independently changes light intensity of a laser beam when an intensity level of a laser beam outputted from a semiconductor laser is modulated. PSOLUTION: The optical pickup system 100 has; a semiconductor laser output control section 110 which emits a laser beam; a photo detector 120 which detects the emitted laser beam; a sample processing section 140 to carry out sample processing; a pulse current generation section 160 to generate a erase current pulse, a write current pulse and a read current pulse; and a control section 180 which controls each of the above sections. Sample processing and each pulse current generation are performed based on the preset APC timing and the semiconductor laser output control section is controlled based on each pulse current and the sample processing. PCOPYRIGHT: (C)2004,JPO&NCIPI