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:
Aug. 10, 2021
Filed:
Aug. 31, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Kiyoshi Onohara, Tokyo, JP;
Keisuke Matsuda, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
Provided is an optical transmission/reception device () for transmitting or receiving an optical signal via a communication path () in which a phase change of the optical signal is suppressed. The optical transmission/reception device () includes: a transmission device () including a framer generation unit (), a symbol mapping unit (), and an optical modulation unit (); and a reception device () including an optical reception front end unit (), an A/D conversion unit (), a polarization separation unit (), and a phase estimating unit () for estimating a phase of at least one of a plurality of polarizations from a plurality of polarization signals separated by the polarization separation unit () and estimating a phase of a remaining polarization on the basis of the estimated phase. The optical transmission/reception device (), therefore, has a small circuit scale and allows a digital coherent reception system to be applied to free space optics or a communication system with a short communication distance such as an access network.