Patent ID: 6744547
Filing Date: 2004-06-01
Classification: G02F

Abstract:
A laser wavelength conversion apparatus comprising:a wavelength conversion element for performing wavelength conversion of laser light entered from an entrance end surface and delivering laser light of a shortened wavelength from an exit end surface; a heat sink surrounding a peripheral surface of said wavelength conversion element and having cooling fins; a heater for uniform heating disposed in said heat sink and surrounding said peripheral surface of said wavelength conversion element; a temperature sensor for measuring a temperature of said wavelength conversion element; and a heater controller for controlling an electric current supplied to said heater for uniform heating so that the temperature measured by said temperature sensor becomes a preset temperature, wherein the cooling fins formed on upward sides of the heat sink have planar faces extending vertically, and wherein the planar faces of the cooling fins formed on the upward sides of the heat sink are arranged perpendicular to planar faces of the cooling fins formed on lower and upper sides of the heat sink.