A laser light source device includes a laser light source that emits a laser beam as a fundamental wave and an optical wavelength conversion element that converts the fundamental wave into a second harmonic. Example embodiments include a cylinder head having two integrated exhaust manifolds, wherein each exhaust manifold is coupled to a turbine of a turbocharger. The glass member 4 is fused to a glass member 5 through the glass layer 3 thus deterred from crystallizing, so as to yield a glass fusing structure 1.