| 摘要 |
PURPOSE:To obtain the wavelength conversion element which is strong to optical damages and has a high output by providing a specific waveguide layer which is formed like a substrate, an incident part which admits light into the waveguide layer, an SHG conversion part which converts the light formed in the waveguide layer to a second harmonic wave SHG, and an exit part which outputs the SHG from the inside of the waveguide layer. CONSTITUTION:This element has an LiTaO3 substrate 1, the waveguide layer 2 of LiNbxTa1-xO3 (0.2<=x<=0.8) formed on the substrate, the incident part 4 which admits the light into the waveguide layer 2, the SHG converting part 3 which converts the light formed in the waveguide layer 2 to the second harmonic wave (SHG) and the exit part 5 which outputs the SHG from the inside of the waveguide layer 2. The waveguide layer 2 is constituted of the mixed crystals composed of the LiTaO3 having the excellent resistance to the optical damages and the LiNbO3 having the large nonlinear optical effect in such a manner. The stable wavelength conversion element which has the excellent resistance to the optical damages and has the high output is obtd. in this way. |
