Abstract: In a method of recording information on an optical disk with the edge recording technique, input data representing the information to be recorded is first converted into a channel bit stream with a chosen code, such as the (2,7) code, and then the different mark lengths are determined by the composition of the channel bit stream, and then a plurality of recording pulses for recording a mark having a length longer than the smallest mark length are generated, said recording pulses having the same pulse width, but the timing of the last recording pulse being adjusted with respect to the remaining recording pulses such that the correct written mark length can be obtained. Finally a writing laser beam is modulated in accordance with the recording pulses.