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. 12, 2022
Filed:
Jan. 04, 2019
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki, JP;
Masakazu Kikawada, Yokohama, JP;
Masatoshi Hirono, Yokohama, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki, JP;
Abstract
According to one embodiment, a transmitting device for a quantum key distribution system includes a light source, a beam splitter, an encoder, and a beam combiner. The light source is configured to generate an optical pulse. The beam splitter is configured to split the optical pulse into a signal pulse that travels through a first path and a polarization control pulse that travels through a second path, the second path being different in an optical path length from the first path. The encoder is provided at the first path and is configured to encode information with respect to the signal pulse. The beam combiner is configured to combine the signal pulse passing through the encoder and the polarization control pulse.