Patent ID: 8587863
Filing Date: 2013-11-19
Classification: G02F,H01S

Abstract:
1. A wavelength conversion device comprising: a first wavelength conversion element and a second wavelength conversion element, the first wavelength conversion element being configured to convert an entering first laser beam into a second laser beam by a first wavelength conversion, the second wavelength conversion element being configured to convert the entering second laser beam into a third laser beam by a second wavelength conversion, the second wavelength conversion element including at least one reflective surface that reflects the second and third laser beams traveling therethrough at least one time, the first wavelength conversion element being arranged so as to reflect the second laser beam onto the at least one of reflective surface in the second wavelength conversion element; and a cooling mechanism that cools the second wavelength conversion element from at least one of the reflective surfaces of the second wavelength conversion element by using a fluid.