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:
Jun. 06, 2006
Filed:
Nov. 23, 2004
Yukihiro Ozeki, Fujisawa, JP;
Kazumi Furuta, Akishima, JP;
Hiroaki Ueda, Suita, JP;
Manami Kuiseko, Kyoto, JP;
Koujirou Sekine, Ibaraki, JP;
Mitsuru Yokoyama, Takatsuki, JP;
Naoki Mitsugi, Hino, JP;
Koji Horii, Tokyo, JP;
Yukihiro Ozeki, Fujisawa, JP;
Kazumi Furuta, Akishima, JP;
Hiroaki Ueda, Suita, JP;
Manami Kuiseko, Kyoto, JP;
Koujirou Sekine, Ibaraki, JP;
Mitsuru Yokoyama, Takatsuki, JP;
Naoki Mitsugi, Hino, JP;
Koji Horii, Tokyo, JP;
Abstract
An optical bidirectional modulehaving therein light emitting elementwhich transmits optical signal to the end facet of the optical fiber, light receiving elementwhich receives optical signal from the end facet of the optical fiber and stair-shaped multi-level grating, wherein the stair-shaped multi-level grating separates the first light path between the end facet of optical fiber and the light emitting element and the second light path between the end facet of optical fiber and the light receiving element by a different wavelength of each optical signal, when the module mixes and separates optical signal with different wavelengths traveling in opposite directions related to the end facet of the optical fiberused for bidirectional optical fiber communication by means of a wavelength multiplex system.