The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2004
Filed:
May. 13, 2002
Masahiro Sasaura, Hitachinaka, JP;
Kazuo Fujiura, Mito, JP;
Koji Enbutsu, Mito, JP;
Tadayuki Imai, Mito, JP;
Shogo Yagi, Mito, JP;
Takashi Kurihara, Mito, JP;
Makoto Abe, Mito, JP;
Seiji Toyoda, Toukai-mura, JP;
Eishi Kubota, Mito, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
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 Nb O is used as an optical waveguide. The input optical signal is transmitted to the KTa Nb O film. The KTa Nb O film undergoes changes in optical property when an external voltage signal is applied to the electrode. Therefore, as it passes through the KTa Nb O film, the input optical signal is modulated by the characteristic change. The modulated optical signal is taken out as an output optical signal.