Recording using laser relaxation oscillation pulses

摘要

An optical disc device includes a light source portion (20) which applies laser light (100) to an optical disc (D), a drive portion (29) which supplies a drive current to the light source portion so as to cause the light source portion to apply laser light of light pulses having relaxation oscillation, and a controller (31) which controls the drive portion to supply a drive current according to a write strategy so as to cause the light source portion to emit laser light of (n-1)xN (N is an integral number) light pulses having relaxation oscillation with respect to a mark with recording mark length nT (n: integral number, T: channel clock) to be recorded on the optical disc. The laser wavelength may be less than 450 nm.