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. 05, 2021
Filed:
Aug. 14, 2015
Nokia Technologies Oy, Espoo, FI;
Hongwei Li, Cambridge, GB;
Enrique Martin-Lopez, Cambridge, GB;
Nokia Technologies Oy, Espoo, FI;
Abstract
In some example embodiments, there is provided an apparatus. The apparatus may include a frequency shifter configured to shift a reference signal to a portion of an optical spectrum separate from another portion of the optical spectrum being used by a signal of interest; and a polarization rotator configured to provide the reference signal shifted and rotated by the polarization rotator. The apparatus may also include a modulator configured to modulate the signal of interest with coherent state information from which quantum key information is derivable. Related systems, methods, and articles of manufacture are also disclosed.