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:
Oct. 04, 2016
Filed:
Jan. 28, 2015
Applicant:
Fujitsu Optical Components Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Shintaro Takeuchi, Sapporo, JP;
Takehito Tanaka, Yokohama, JP;
Assignee:
FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/61 (2013.01); G02F 1/225 (2006.01); G02F 1/01 (2006.01); H04B 10/25 (2013.01);
U.S. Cl.
CPC ...
H04B 10/613 (2013.01); G02F 1/0147 (2013.01); G02F 1/225 (2013.01); H04B 10/25 (2013.01); H04B 10/611 (2013.01); H04B 10/614 (2013.01); H04B 10/6162 (2013.01); G02F 2203/48 (2013.01);
Abstract
An optical receiver circuit includes a polarization beam splitter configured to split input signal light into two different polarized wave components; two variable optical attenuators configured to respectively adjust attenuation of and output the signal light split by the polarization beam splitter according to polarization state; and a single planar optical waveguide on which the polarization beam splitter and the two variable optical attenuators are disposed.