Patent ID: 7693193

Claim:
A laser light source device, comprising: a laser light source that emits a laser light; and an optical wavelength conversion section that includes a ferroelectric material carrying therein a plurality of polarization inversion rows in which a polarization inversion area and a polarization non-inversion area are alternately formed in a predetermined direction out of alignment with respect to each other in the predetermined direction, and converts the laser light directed in the predetermined direction into a second harmonic, wherein the plurality of polarization inversion rows are arranged at intervals in a direction that is perpendicular to the predetermined direction, the laser light source is disposed at a fixed position to allow any one of the polarization inversion rows to be positioned on an optical path of the laser light, and the polarization inversion areas are positioned such that the laser light passing through the polarization inversion row passes through at least a portion of each polarization inversion area.