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. 28, 2010
Filed:
Jun. 28, 2007
Kiyotoshi Noheji, Kawasaki, JP;
Kiyotoshi Noheji, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical reception apparatus according to the present invention comprises: a branching section that branches an optical signal input thereto into two; first and second delay interferometers arranged on optical paths through which the branched lights are propagated; first and second photoelectric converting sections that receive the output lights from the delay interferometers; a clock recovery circuit for recovering a clock signal based on a data signal output from one of the photoelectric converting sections; a multiplexing section that multiplexes data signals from the photoelectric converting sections in accordance with the clock signal; and a delay interferometer control section that resets operating conditions of the delay interferometers when the frame synchronization is not achieved. Thus, it becomes possible to perform the demodulation processing on the signal light which is differential phase shift keying modulated using a quadrature phase component, utilizing a general-purpose framer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile