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:
Oct. 13, 2020
Filed:
Mar. 29, 2016
Applicant:
Nokia Technologies Oy, Espoo, FI;
Inventors:
David Bitauld, Cambridge, GB;
Enrique Martin-Lopez, Cambridge, GB;
Assignee:
Nokia Technologies Oy, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/01 (2006.01); H04B 10/70 (2013.01); G02F 1/21 (2006.01); H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04B 10/70 (2013.01); G02F 1/21 (2013.01); H04L 9/0852 (2013.01); G02F 2001/217 (2013.01);
Abstract
According to an example aspect of the present invention, there is provided an apparatus comprising a first and a second polarization beam splitter-rotator (), together arranged to split two incoming polarization encoded qubits into four first optical modes, the apparatus being configured to align polarizations of the four first optical modes, an interferometer stage () configured to obtain, from the four first optical modes, four second optical modes, and four detectors () arranged to receive at least one of the four second optical modes.