Patent ID: 7301883

Claim:
A method of writing a mark to an optical disc comprising: receiving data to be written; generating a control parameter having a value within a range from about zero to about one; and generating a control signal for a laser pulse having a predefined period comprising a delay period, a melt period and a growth period, wherein the delay period begins with a transition from a read power to a premelt power, the melt period comprises a transition from the premelt power to a melt power configured to melt a region of the optical disc, the growth period begins with a transition from the melt power to a growth power configured to allow formation of crystalline material, includes a transition from the growth power to the read power and ends with an end of the predefined period, and wherein the premelt power, a a position of the transition from the premelt power to the melt power and a position of the transition from the growth power to the read power are adjusted based upon the data to be written and control parameter, wherein a duty cycle of the melt period and a duty cycle of the growth period are adjusted with respect to each other according to said control parameter.