A second harmonic wave-generation device

摘要

A second harmonic wave-generation device for generating a second harmonic wave from a fundamental wave has an optical waveguide (3) for converting a wavelength made of a solid crystal of lithium potassium niobate-lithium potassium tantalate solid solution single crystal, a reflective grating (5) part for fixing a wavelength of the fundamental wave entering the wavelength-converting optical waveguide, and a temperature controller such as a heater film (4) for controlling temperature of at least the wavelength-converting optical waveguide The fundamental wave is an ordinary ray, the second harmonic wave is an extraordinary ray, and the fundamental wave is converted to the second harmonic wave in the wavelength-converting optical waveguide. <IMAGE>