Patent ID: 7471606

Claim:
A method of recording information on an optical recording medium, comprising the steps of: pulse-modulating a laser beam so as to create a pulse series including a write pulse of a recording power and a cooling pulse of an approximately base power; and irradiating the pulse-modulated laser beam on a recording layer included in the optical recording medium for recording, whereby data to be recorded is modulated to have a length of a recording mark along a track of the recording layer and the length of the recording mark is made to correspond to an integral multiple nT of T where T is one clock cycle, wherein the same number of the write pulses and the cooling pulses are used when an nT recording mark with the n being 4 or larger is to be recorded; and an average width AveTc for a single cooling pulse width Tc is set to satisfy: 1.0<AveTc/T<1.6, and a total pulse width SumTc of the used cooling pulses is set to satisfy: 0.5≦SumTc/nT≦0.8.