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. 30, 2019
Filed:
Dec. 16, 2013
Applicant:
Nokia Technologies Oy, Espoo, FI;
Inventors:
David Bitauld, Cambridge, GB;
Antti Niskanen, Cambridge, GB;
Assignee:
Nokia Technologies Oy, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/70 (2013.01); G02F 1/35 (2006.01); H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0852 (2013.01); G02F 1/353 (2013.01); H04B 10/70 (2013.01); H04L 2209/34 (2013.01);
Abstract
Methods and apparatus for use in quantum cryptographic applications are disclosed. An optical signal having a first wavelength is encoded for quantum cryptography at a stage where the optical signal is on at least two signal paths. The wavelength of the encoded optical signal on the at least two signal paths is converted to a second wavelength before the optical signal is encoded for transmission. Encoding for transmission is applied to the optical signal on the second wavelength.