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:
Aug. 25, 2009
Filed:
Jul. 01, 2005
Tsutomu Kitoh, Atsugi, JP;
Yohei Sakamaki, Atsugi, JP;
Toshikazu Hashimoto, Yamato, JP;
Takashi Saida, Sagamihara, JP;
Hiroshi Takahashi, Atsugi, JP;
Masahiro Yanagisawa, Mito, JP;
Ikuo Ogawa, Atsugi, JP;
Tomohiro Shibata, Tokyo, JP;
Senichi Suzuki, Mito, JP;
Tsutomu Kitoh, Atsugi, JP;
Yohei Sakamaki, Atsugi, JP;
Toshikazu Hashimoto, Yamato, JP;
Takashi Saida, Sagamihara, JP;
Hiroshi Takahashi, Atsugi, JP;
Masahiro Yanagisawa, Mito, JP;
Ikuo Ogawa, Atsugi, JP;
Tomohiro Shibata, Tokyo, JP;
Senichi Suzuki, Mito, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
The present invention provides an optical functional circuit where a holographic wave propagation medium is applied and a circuit property is excellent such as small transmission loss and crosstalk. The optical functional circuit where a plurality of circuit elements are formed on a substrate includes the wave propagation medium for converting an optical path of a leakage light so that the leakage light that is not emitted from a predetermined output port of the circuit element is not coupled to a different circuit element. This wave propagation medium is constituted by an optical waveguide that is provided with a clad layer formed on the substrate and a core embedded in the clad layer, and a part of the optical waveguide is formed in accordance with a refractive index distribution which is multiple scattered.