PIGMENT-BASED WRITE ONCE TYPE DVD MEDIUM RECORDING/REPRODUCING METHOD AND DEVICE

摘要

It is possible to provide an optical recording/reproducing method and device capable of obtaining a preferable recording waveform when performing a high linear velocity recording to a pigment-based write once type DVD medium. The pigment-based write once type DVD medium recording/reproducing method is performed as follows. The shortest mark is recorded with a higher output pulse than the other marks onto a recording layer mainly composed of organic pigment and formed on a substrate having a wobbled guide groove. The third shortest mark and after are recorded by a single pulse light having a pulse power equal to that of the second shortest mark which has been outputted highly when the pulse rear end has been outputted highly for a predetermined period of time. When performing mark recording, a cooling pulse is irradiated to the rear end and after of the pulse of all the marks and the irradiation light intensity is maintained at 0.1 mW or below for a predetermined period of time.