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. 14, 2026
Filed:
Jan. 31, 2024
Optical transmitter, a quantum communication system and a method of operating an optical transmitter
Kabushiki Kaisha Toshiba, Tokyo, JP;
Taofiq Paraiso, Cambridge, GB;
Andrew Simpkins, Cambridge, GB;
Mirko Sanzaro, Cambridge, GB;
Thomas Roger, Cambridge, GB;
Andrew James Shields, Cambridge, GB;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An optical transmitter for quantum key distribution. The transmitter comprises a first and a second. Each laser is configured to emit phase-randomised pulses. The transmitter further comprises an optical combiner configured to combine the pulses emitted from the first and second laser into a combined stream of pulses based on an adjustable combining ratio. The transmitter further comprises a Mach-Zehnder interferometer with a short and a long arm. The interferometer has an input port configured to receive the combined stream of pulses and an output port configured to provide an output of the interferometer. At least one of the arms comprises a phase controlling element to control a phase between the short and long arm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile