Patent ID: 9166360
Filing Date: 2015-10-20
Classification: G02F,H01S

Abstract:
1. A laser light source apparatus, comprising: a semiconductor laser; a wavelength conversion element which carries out wavelength conversion of laser light emitted from the semiconductor laser; a heater which heats the wavelength conversion element; an electric power supply circuit which supplies electric power to the semiconductor laser; a heater electric power supply circuit which supplies electric power to the heater; a temperature control unit which detects the temperature of the wavelength conversion element, controls the amount of electric power supply to the heater, and controls the temperature of the wavelength conversion element to turn into target temperature, and a control unit which controls the heater electric power supply circuit and the electric power supply circuit which supplies electric power to the semiconductor laser, wherein the control unit is provided with a high temperature hang-up suppressing unit which suppresses a high temperature hang-up state where the temperature of the wavelength conversion element cannot be controlled even if the amount of electric power supply to the heater is reduced in a temperature region higher than the temperature at which the conversion efficiency of the wavelength conversion element turns into the maximum, by decreasing electric power supply to the semiconductor laser by a predetermined amount, when the high temperature hang-up state occurs.