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.sub.xNb.sub.1-xO.sub.3 is used as an optical waveguide. The input optical signal is transmitted to the KTa.sub.xNb.sub.1-xO.sub.3 film. The KTa.sub.xNb.sub.1-xO.sub.3 film undergoes changes in optical property when an external voltage signal is applied to the electrode. Therefore, as it passes through the KTa.sub.xNb.sub.1-xO.sub.3 film, the input optical signal is modulated by the characteristic change. The modulated optical signal is taken out as an output optical signal.

 
Web www.patentalert.com

< Neural network for controlling calls in a telephone switch

< Apparatus to induce stress into a fiber optic cable to detect security fence climbing

> Transfer power supply apparatus of an image forming machine

> Electrical contact adapter and toner cartridge using electrical contact adapter and method
~ 00287