Phase-change optical recording medium, optical recording method, and optical recording apparatus

A use of a phase-change optical recording medium for an optical recording method,

• wherein the optical recording method comprises:
• controlling an irradiation power by three values, namely a peak power (Pp) which is the irradiation power of a heating pulse, a bottom power (Pb) which is the irradiation power of a cooling pulse and an erase power (Pe) for erasing a recording mark, and
• recording by varying an irradiation time of each pulse in proportion with a clock T corresponding to the recording linear velocity,
• wherein the phase-change optical recording medium comprises a phase-change recording layer on a substrate;
• a light irradiated on the phase-change optical recording medium comprises a pulse string of heating pulses and cooling pulses, and a light for erasing;
• at least any one of Pe/Pp, Pp, Pb and Pe is set variable within a range from the minimum recording linear velocity to the maximum recording linear velocity of the phase-change optical recording medium;
• a peculiar recording linear velocity is a recording linear velocity at which jitter degrades abruptly to show a local maximum value;
• and the optical recording method performs a recording by varying at least Pe/Pp from a specific recording linear velocity which is lower than the peculiar recording linear velocity.

An optical recording apparatus comprising a laser beam source, wherein the optical recording apparatus performs a recording at a recording linear velocity of 3 m/s to 56 m/s using the optical recording method,

• wherein the optical recording method comprises:
• controlling an irradiation power by three values, namely a peak power (Pp) which is the irradiation power of a heating pulse, a bottom power (Pb) which is the irradiation power of a cooling pulse and an erase power (Pe) for erasing a recording mark, and
• recording by varying an irradiation time of each pulse in proportion with a clock T corresponding to the recording linear velocity,
• wherein the phase-change optical recording medium comprises a phase-change recording layer on a substrate;
• a light irradiated on the phase-change optical recording medium comprises a pulse string of heating pulses and cooling pulses, and a light for erasing;
• at least any one of Pe/Pp, Pp, Pb and Pe is set variable within a range from the minimum recording linear velocity to the maximum recording linear velocity of the phase-change optical recording medium;
• a peculiar recording linear velocity is a recording linear velocity at which jitter degrades abruptly to show a local maximum value;
• and the optical recording method performs a recording by varying at least Pe/Pp from a specific recording linear velocity which is lower than the peculiar recording linear velocity.