Patent ID: 6580737
Filing Date: 2003-06-17
Classification: B82Y,G11B,H01S

Abstract:
An optical disc recording and/or reproducing apparatus, comprising:a semiconductor laser; a D.C. current source operably connected to provide a drive signal to the semiconductor laser; and a R.F. current source operably connected to the D.C. current source so that the drive signal is modulated by a R.F. signal from the R.F. current source, wherein the semiconductor laser is characterized by a curve representing relative intensity noise to average optical output, the curve having a plurality of peaks caused by the drive signal modulated with the R.F. signal; and where the R.F. current source is operably configured such that the R.F. signal has a predetermined frequency, fm, and a predetermined amplitude, am, that cause the semiconductor laser to operate at an average optical output offset from each of the peaks.