Patent ID: 7313078

Claim:
An apparatus for recording data to an optical recording medium, comprising a recording waveform generating unit generating a recording waveform which includes a first multi-pulse corresponding to a first level of input data, a second multi-pulse corresponding to a second level of the input data, and a cooling pulse, the first multi-pulse following the second multi-pulse, and the second multi-pulse having a leading pulse, second low power pulses having a low power level and second high power pulses having a high power level; and a pickup unit to drive a laser to generate a laser beam according to the generated recording waveform and an optical head to focus the laser beam on the optical recording medium to create spaces and marks using the generated recording waveform, wherein: the leading pulse is set to the low power level and a power level of a period between an end of the second multi-pulse and a start of the first multi-pulse is set to the high power level, and the cooling pulse extends from an end of another first multi-pulse preceding the second multi-pulse to the leading pulse and has a cooling power level that is less than the low power level.