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. 28, 2014
Filed:
Jun. 28, 2006
Satomi Shioiri, Tokyo, JP;
Toshiharu Itou, Tokyo, JP;
Kiyoshi Fukuchi, Tokyo, JP;
Hitoshi Takeshita, Tokyo, JP;
Satomi Shioiri, Tokyo, JP;
Toshiharu Itou, Tokyo, JP;
Kiyoshi Fukuchi, Tokyo, JP;
Hitoshi Takeshita, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In the optical communication device and the optical communication system using DPSK modulation whose cost is low, whose size is small and whose power consumption is low, the N:1 multiplexergenerates a serial signal by multiplexing a parallel signal coded by the DPSK modulation coding unitsbit by bit on a time division basis. The electric-phase modulation optical converterconverts a serial signal into a phase modulation light. The N-bit delay interferometerexecutes DPSK decoding with respect to a phase modulation light by comparison with an N-bit preceding optical signal. The optical-electric signal converterconverts a decoded intensity modulation light into an electric signal. The N:1 demultiplexerdivides an electric signal converted by the optical-electric signal converterinto a number N of signals bit by bit on a time division basis.