| 摘要 |
PURPOSE:To convert incident light to higher harmonic light showing satisfactory light intensity distribution so that it can be emitted to a desired direction by providing a first optical waveguide on which a light beam is made incident, and a second optical waveguide in which higher harmonic light which is brought to phase matching with the first optical waveguide is propagated and emitted. CONSTITUTION:An optical wavelength converter 20 contains a non-linear optical crystal 11 in which an optical waveguide 12 being the first optical waveguide and an optical waveguide 15 being the second optical waveguide are formed and a grating layer 16 formed on the face for coming into contact with the optical waveguide 15. When a laser light 13 is made incident on the optical waveguide 12 from an incident end face 21 and advanced, a higher harmonic light 18 is generated at an angle theta for satisfying a phase matching condition in the non-linear optical crystal 11. Such higher harmonic light 18 is projected the non-liner optical crystal 11, led to the optical waveguide 15 by the grating layer 16 and emitted to the outside. |
