Patent ID: 8265111

Claim:
A laser light source module comprising a heat sink in which a solid laser element that oscillates a fundamental laser beam, an excitation light source that excites the solid laser element, and a wavelength conversion element that converts a wavelength of the fundamental laser beam oscillated by the solid laser element, and a stem that supports the heat sink, wherein: the heat sink is separated into three blocks that are: a first block on a top surface of which a laser oscillating unit for the solid laser element that oscillates the fundamental laser beam is arranged; a second block on a top surface of which a semiconductor laser element that emits excitation light for the laser oscillating unit and a first temperature sensor are arranged, and on a specific surface of which a first heater is arranged; and a third block on a top surface of which the wavelength conversion element that converts the wavelength of the fundamental laser beam oscillated by the laser oscillating unit and a second temperature sensor are arranged, and on a specific surface of which a second heater is arranged; and only the second block is fixed at a side surface or a bottom surface thereof to the stem, the first block is fixed to the other side surface of the second block, and the third block is fixed to a side surface of the first block, the wavelength conversion element is arranged on a substrate fixed onto the top surface of the third block with a thermal diffusion plate interposed therebetween; and the second temperature sensor and the second heater are arranged on the substrate.