Optical waveguide and method of manufacture

摘要

An optical waveguide capable of having various characteristics and a method of manufacture thereof as well as a method of manufacturing a crystal film are provided. An optical functional material KTa_xNb_1-xO₃ is used as an optical waveguide. The input optical signal is transmitted to the KTa_xNb_1-xO₃ film. The KTa_xNb_1-xO₃ film undergoes changes in optical property when an external voltage signal-is applied to the electrode. Therefore, as it passes through the KTa_xNb_1-xO₃ film, the input optical signal is modulated by the characteristic change. The modulated optical signal is taken out as an output optical signal.