HIGH-SPEED OPTICAL RECORDING

摘要

An optical recorder comprises a laser driver for generating a laser drive signal in which level changes are aligned on a time grid with a given pitch (Tdr). The laser driver provides the laser drive signal with a pattern that comprises an intermediate level (Pi50%). The intermediate level (Pi50%) is chronologically arranged between a quiescent level (Pb) for leaving a space on an optical disk track and a write level (Pw) for writing a mark on the optical disk track. The intermediate level (Pi50%) is comprised between the quiescent level (Pb) and the write level (Pw).