Optical waveguide device and optical second harmonic generator using the same.

摘要

An optical waveguide device is disclosed which comprises a KTiOPO4 single crystal substrate (1) and an amorphous optical waveguide (2) formed of Ta2O5 or Ta2O5 doped with TiO2. A second harmonic generator device in the form of the Cerenkov radiation using the optical waveguide has high SHG efficiency. Since the Cerenkov angle ( theta ) can be made small by optimizing the dimensions, the spread angle of the SHG light can be made small. <IMAGE>