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:
Jul. 11, 2017
Filed:
Mar. 03, 2014
Nec Corporation, Minato-ku, Tokyo, JP;
Yoichi Hashimoto, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In a digital coherent communication scheme utilizing polarization-multiplexed optical signals, it may be impossible to separate transmission light and reception light from each other with high precision for transmission/reception an optical signal. An optical space transmission system according to the present invention is provided with a first transmission/reception device which radiates first reception light and second reception light whose polarization states are orthogonal to each other, and a second transmission/reception device which radiates third reception light alternately including a first reception light component whose polarization state is the same as the first reception light and a second reception light component whose polarization state is the same as the second reception light in a time-wise manner.