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. 19, 2016
Filed:
Nov. 22, 2011
Kazuomi Endo, Tokyo, JP;
Yoichi Hashimoto, Tokyo, JP;
Kazuomi Endo, Tokyo, JP;
Yoichi Hashimoto, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to perform the polarization demultiplexing of the polarization multiplexed BPSK signal using a small-scale circuit by means of optical phase modulation of the polarization multiplexed BPSK signal into the pseudo polarization multiplexed QPSK signal, an optical communication system for communicating by using polarization multiplexed optical signals includes an optical phase modulation means for modulating phases of a plurality of optical signals employing BPSK modulation system including information to be communicated, and for generating a plurality of optical signals to become signals by pseudo QPSK modulation system; and a signal restoration means for performing polarization demultiplexing of a plurality of polarization multiplexed optical signals from a plurality of optical signals modulated into the pseudo QPSK modulation system, and for restoring the information to be communicated.