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. 05, 2010
Filed:
Aug. 23, 2005
J. Howell Mitchell, Amherst, NH (US);
Harry Vig, North Billerica, MA (US);
J. Howell Mitchell, Amherst, NH (US);
Harry Vig, North Billerica, MA (US);
MagiQ Technologies, Inc., Somerville, MA (US);
Abstract
Systems and methods for multiplexing two or more channels of a quantum key distribution (QKD) system are disclosed. A method includes putting the optical public channel signal (SP) in return-to-zero (RZ) format in a transmitter (T) in one QKD station (Alice) and amplifying this signal (thereby forming SP*) just prior to this signal being detected with a detector () in a receiver (R) at the other QKD station (Bob). The method further includes precisely gating the detector via a gating element () and a coincident signal (PN) with pulses that coincide with the expected arrival times of the pulses in the detected (electrical) public channel signal (SP). This allows for the public channel signal to have much less power, making it more amenable for multiplexing with the other QKD signals.