FIELD: data storage, optical disk recording systems including compact disks. SUBSTANCE: optical disk device has modulating signal level selecting means responding to data to be recorded to control laser beam on-off operations during data recording. Device is characterized in that it has means for selecting modulation signal in compliance with its variation model. Means for correcting selection of modulating signal in the course of recording provides for eliminating signal jitter during reproduction caused by noise between characters. EFFECT: enhanced reliability of recorded data reproduction. 10 cl, 12 dwg
