Wavelength conversion laser light source, an optical element and an image display device

Comprising a solid-state laser medium for generating fundamental wave light, the fundamental wave light, and the wavelength conversion element for converting the second harmonic light of a frequency higher than the fundamental light, a conductive material in contact with the wavelength conversion element, the , the wavelength conversion element includes a polarization inversion structure in which a plurality of polarization inversion region is formed, a first side surface intersecting the polarization inversion region and perpendicular to, the conductive material is in contact with the first side surface wavelength conversion laser light source according to claim.