Schreiben optischer Daten auf eine Scheibe

A write control method for writing optical disk data wherein pits are written on a medium by a write signal composed of mark signal parts and space signal parts, the length of each pit representing the optical disk data, having the steps of: converting the mark signal parts to pulses and generating a series of pulse trains which correspond to the lengths of the mark signal parts, respectively; controlling length and/or amplitude of or in each of the pulse trains in accordance with the length of the space signal part immediately before the mark signal part concerned; and applying successively the controlled pulse trains to laser irradiation means so that the pits are written. Apparatus for controlling writing is also provided.