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:
Jan. 06, 2015
Filed:
Jun. 15, 2011
Kenji Mizutani, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Masahiro Sakauchi, Tokyo, JP;
Tomoyuki Hino, Tokyo, JP;
Masahiro Hayashitani, Tokyo, JP;
Hiroyuki Takagi, Tokyo, JP;
Kenji Mizutani, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Masahiro Sakauchi, Tokyo, JP;
Tomoyuki Hino, Tokyo, JP;
Masahiro Hayashitani, Tokyo, JP;
Hiroyuki Takagi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In order to realize a multiplexer/demultiplexer in which utilization efficiency of a frequency is high, wavelength characteristics of a transmission band is flat, the cost is low, the size is small, and a wavelength and a band are variable, the multiplexer/demultiplexer includes: first light branching means for branching inputted light into plurality of pieces of light and outputting the branched pieces of light; a plurality of light wavelength separating means for separating and outputting light outputted from the first light branching means for each of predetermined frequency bands; and an optical coupling means for making outputs having frequency bands different from each other among outputs from the light wavelength separating means gather and be outputted.