| 摘要 |
A data recording method of modulating the power of a laser beam in accordance with a pulse pattern, projecting the laser beam onto a write-once type optical recording medium to form a record mark and recording data in the write-once type optical recording medium, wherein the pulse pattern is constituted by a pattern in which the power of the laser beam is set to a recording power Pw within a first period and a second period and the power of the laser beam is set to an intermediate power Pm lower than the recording power Pw within a third period provided between the first period and the second period, the length of the first period and the levels of the recording power Pw and the intermediate power Pw being set to satisfy 1.7T<=Ttop2 and 1.4<=Pw/Pm where T is a length corresponding to one cycle of a reference pulse and ttop2 is the length of the first period. According to the thus constituted data recording method, it is possible to record data in a write-once type optical recording medium at a high linear recording velocity.
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