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:
Jun. 16, 2020
Filed:
Oct. 14, 2016
National University Corporation Hokkaido University, Sapporo-shi, Hokkaido, JP;
Optoquest Co., Ltd., Ageo, Saitama, JP;
National Institute of Information and Communications Technology, Koganei-shi, Tokyo, JP;
Atsushi Okamoto, Sapporo, JP;
Tomokazu Oda, Sapporo, JP;
Taketoshi Takahata, Ageo, JP;
Shusaku Noda, Ageo, JP;
Naoya Wada, Koganei, JP;
National University Corporation Hokkaido University, Hokkaido, JP;
Optoquest Co., Ltd., Saitama, JP;
National Institute of Information and Communications Technology, Tokyo, JP;
Abstract
An optical communication system is arranged to bring out potential capabilities of mode-division multiplexing (MDM). The optical communication system includes a hologram medium in which holograms are multiplex-recorded so as to correspond to respective spatial modes of signal light transmitted by a multi-mode fiber (MMF). A phase plate modulates phases of the respective spatial modes so as to reduce a spatial overlap between the spatial modes, and is provided on a side of the hologram medium on which signal light enters the hologram medium.