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. 08, 2010
Filed:
Sep. 28, 2007
Junji Iida, Tokyo, JP;
Akio Watanabe, Tokyo, JP;
Mikio Uemura, Tokyo, JP;
Hideharu Okami, Chiba, JP;
Junji Iida, Tokyo, JP;
Akio Watanabe, Tokyo, JP;
Mikio Uemura, Tokyo, JP;
Hideharu Okami, Chiba, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
A bidirectional optical module having a devicefor emitting transmitting signal light, an optical fiberwhich the transmitting signal light from the device enters, a light-receiving devicewhich light from the optical fiber enters, and a wavelength splitting filter. The transmitting signal light emitted from the device is sent forward through the optical fiber, and the receiving signal light is received through the optical fiber. The bidirectional optical module has an optical device (optical isolator) of a reflection polarizerbonded to an end face of the optical fiber, a Faraday rotatordisposed integrally on the reflection polarizer and an absorption polarizerdisposed on an optical path extending between the device and the filter. The reflection polarizer has a wavelength dependency which functions as a polarizer for the transmitting signal light, but does not function as a polarizer for the receiving signal light.