Patent ID: 7817689

Claim:
A laser source device comprising: a plurality of lasers arranged in an array; wavelength converting elements that convert wavelengths of a plurality of light beams emitted from the plurality of lasers, the wavelength converting elements being shaped in the form of plates, an end surface of each of the plates being arranged so as to oppose light emitting ports of the plurality of lasers; a plurality of temperature sensors that respectively detect the temperatures of each of the wavelength converting elements, the temperature sensors being arranged on first sides of the plates of the wavelength converting elements; a plurality of temperature adjusting units respectively arranged on second sides of the plates of the wavelength converting elements; a temperature controller that controls the temperature adjusting units so as to control the temperatures of the wavelength converting elements on the basis of outputs of the temperature sensors; heat-shielding structures or clearances arranged between the wavelength converting elements; and a heat conductive member being a member having low heat resistance and having a plurality of through-holes in which the wavelength converting elements and the temperature sensors arranged for the respective laser arrays are inserted, wherein the wavelength converting elements and the temperature sensors are thermally adhered to side surfaces of the through-holes.