LASER BEAM POWER MODULATION PATTERN DECISION METHOD, DEVICE FOR RECORDING DATA ONTO OPTICAL RECORDING MEDIUM, AND OPTICAL RECORDING MEDIUM

摘要

A laser beam power modulation pattern decision method includes a step of fixing a recording power to a predetermined level, a step of changing the base power level to decide the pulse string patterns, a step of modulating the laser beam intensity according to the pulse string patterns, recording a first test signal onto an optical recording medium, and reproducing it, a step of deciding a base power optimal level according to the amplitude of the reproduced first test signal, a step of further fixing the base power level to an optimal level, a step of changing the recording power level to decide pulse string patterns, a step of modulating the laser beam intensity according to the pulse string patterns, recording a second test signal onto the optical recording medium, and reproducing it, and a step of deciding a recording power optimal level according to the jitter or error rate of the reproduced second test signal.