Patent ID: 7668063

Claim:
An optical disk device, comprising: a memory which stores types of optical disks and parameters of write strategies in correspondence to one another, each of the write strategies stipulating a pulse modulation of an output of a laser during recording; a parameter acquisition unit which acquires, from the memory parameters of a write strategy corresponding to a type of an optical disk upon which data is to be recorded; a recording unit which irradiates pulse modulated laser light upon the optical disk based upon the parameters of the write strategy acquired by the parameter acquisition unit, and forms, in order upon the optical disk, marks corresponding to the data shown by an inputted recording signal; a sampling unit which performs sampling of a signal used for servo control during a sampling period which is set within the period from after the completion of formation of a mark upon the optical disk to the start of formation of the next mark, and holds the signal for servo control along with the end of this sampling period; a sampling servo control unit which performs servo control, based upon the signal sampled by the sampling unit; a timing setting unit which sets the sampling period, using the parameters of the write strategy acquired by the parameter acquisition unit; and wherein using a parameter of the write strategy related to a cooling pulse, the timing setting unit sets a start timing of the sampling period, to a timing which is delayed from a falling timing of the inputted recording signal by a time period slightly longer than a time period corresponding to a width of the cooling pulse which is stipulated by the write strategy.