Patent ID: 7561604

Claim:
A laser light source device comprising: a light source emitting light of a first wavelength; an external resonator selectively reflecting the light of the first wavelength and thereby leading the light toward the light source, and emitting a first laser light of a second wavelength which is different from the first wavelength; a wavelength conversion element provided in a first optical-path formed between the light source and the external resonator, and converting the wavelength of part of incident light having the first wavelength into the second wavelength which is different from the first wavelength; and an optical-path conversion element causing the light that has been converted into light of the second wavelength in the process of traveling to the light source due to reflection from the external resonator to be separated into a second optical-path different from the first optical-path, and emitting a second laser light of the second wavelength, wherein the first laser light and the second laser light are utilized as output lights, and the height of the wavelength conversion element is greater than a distance between an optical-axis of the first laser light on an end face of the wavelength conversion element which is close to the external resonator and an optical-axis of the second laser light.