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. 15, 2025
Filed:
Feb. 27, 2023
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Benjamin Griffiths, Cambridge, GB;
Robert Ian Woodward, Cambridge, GB;
James F. Dynes, Cambridge, GB;
Andrew James Shields, Cambridge, GB;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/50 (2013.01); H04B 10/508 (2013.01); H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04B 10/503 (2013.01); H04B 10/508 (2013.01); H04L 9/0858 (2013.01);
Abstract
An optical transmitter for a Quantum Key Distribution (QKD) system, the transmitter comprising: a multi-modal laser; a wavelength tuneable laser arranged to inject light into a cavity of the multi-modal laser, so as to cause the multi-modal laser to output light at a selected wavelength for use in generating pulses to be output by the transmitter; and a modulator for controlling a phase shift between successive pulses output from the transmitter.