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:
Feb. 24, 2015
Filed:
Dec. 05, 2007
Makoto Takahashi, Kokubunji, JP;
Hideo Arimoto, Kodaira, JP;
Kazuhiko Hosomi, Tachikawa, JP;
Toshihiko Fukamachi, Kokubunji, JP;
Shigeki Makino, Kokubunji, JP;
Yasunobu Matsuoka, Hachioji, JP;
Toshiki Sugawara, Kokubunji, JP;
Makoto Takahashi, Kokubunji, JP;
Hideo Arimoto, Kodaira, JP;
Kazuhiko Hosomi, Tachikawa, JP;
Toshihiko Fukamachi, Kokubunji, JP;
Shigeki Makino, Kokubunji, JP;
Yasunobu Matsuoka, Hachioji, JP;
Toshiki Sugawara, Kokubunji, JP;
Hitachi Ltd., Tokyo, JP;
Abstract
A core of an optical waveguide and a core of a waveguide type optical device are adjacently disposed, and a layer is continuously formed at one end of the core of the waveguide type optical device, wherein an effective refractive index of the layer decreases toward a long axis direction of the optical waveguide stripe.