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. 28, 2002
Seimi Sasaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A wavelength multiplexing bidirectional optical transmission module includes a transparent plate having first and second reflection surfaces opposing each other, a diffraction grating formed on a part of one of the first and second reflection surfaces and photoelectric transfer elements. The diffraction grating receives a wavelength-multiplexed optical signal composed of at least two light beams of proximate wavelength bands and produces diffracted light beams one for each wavelength at different angles. The photoelectric transfer elements receive the diffracted light beams, respectively, that have been reflected and propagated between the first and second reflection surfaces.