公开(公告)号：US11088777B2

公开(公告)日：2021-08-10

申请号：US16966455

申请日：2018-01-31

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Ruben Soares Luis ,  Georg Friedrich Rademacher ,  Ben Puttnam ,  Satoshi Shinada ,  Naoya Wada

IPC: H04B10/00 ,  H04J14/06 ,  H04B10/516 ,  H04B10/66 ,  H04J14/00

Abstract: It is therefore an object of the disclosure of this document to attain a data transmission system with a simple transmitter implementing polarization multiplexing using either DML or EAM and a receiver with only one PD. A data transmission system 1 which comprises a transmitter 3 and a receiver 5, wherein the transmitter 3 comprises a first signal processor 11 and an optical signal generator 13, the optical signal generator 13 outputs an optical signal which comprises X and Y polarization components, ex(t) and ey(t), and wherein the first signal processor 11 receives a first data stream, Sx, and a second data stream, Sy, and controls the X and Y polarization components to reflect the first and the second data streams, respectively, wherein the receiver 5 comprises only one photodetector 21 and a second signal processor 23.

公开(公告)号：US10090933B2

公开(公告)日：2018-10-02

申请号：US15565416

申请日：2015-04-10

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Luis Ruben Soares ,  Ben Puttnam ,  Mendinueta Jose Manuel Delgado ,  Yoshinari Awaji ,  Naoya Wada

IPC: H04B10/06 ,  H04B10/63 ,  H04B10/61 ,  H04B10/67

Abstract: The receiver 11 for self-homodyne detection comprises a coherent detection system and a direct detection system. The receiver comprises a polarization splitter 13, a first splitter 15, a 90 degree polarization rotor 17, a hybrid detector 19, a first balanced detector 21, and a processor 23.

公开(公告)号：US10686529B2

公开(公告)日：2020-06-16

申请号：US15779693

申请日：2016-10-14

Applicant: National University Corporation Hokkaido University ,  OPTOQUEST CO., LTD. ,  NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Atsushi Okamoto ,  Tomokazu Oda ,  Taketoshi Takahata ,  Shusaku Noda ,  Naoya Wada

IPC: H04B10/548 ,  H04B10/2581 ,  H04J14/02 ,  H04J14/04

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.

公开(公告)号：US20200014465A1

公开(公告)日：2020-01-09

申请号：US15779693

申请日：2016-10-14

Applicant: National University Corporation Hokkaido University ,  OPTOQUEST CO., LTD. ,  NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Atsushi Okamoto ,  Tomokazu Oda ,  Taketoshi Takahata ,  Shusaku Noda ,  Naoya Wada

IPC: H04B10/548 ,  H04B10/2581 ,  H04J14/04 ,  H04J14/02

Abstract: An object of the present invention is to bring out potential capabilities of mode-division multiplexing (MDM). An optical communication system includes a hologram medium (1) in which holograms are multiplex-recorded so as to correspond to respective spatial modes of signal light transmitted by a multi-mode fiber (MMF) (2). A phase plate (4) which modulates phases of the respective spatial modes so as to reduce a spatial overlap between the spatial modes is provided on a side of the hologram medium (1) on which side the signal light enters the hologram medium (1).

公开(公告)号：US10284304B2

公开(公告)日：2019-05-07

申请号：US15565419

申请日：2015-04-10

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Luis Ruben Soares ,  Ben Puttnam ,  Mendinueta Jose Manuel Delgado ,  Yoshinari Awaji ,  Naoya Wada

IPC: H04B10/06 ,  H04B10/63 ,  H04J14/04 ,  H04B10/67 ,  H04B10/61

Abstract: A SDH receiver which comprises a first polarization beam splitter 11, a second polarization beam splitter 13, a first separator 15, a second separator 17, a third separator 19, a fourth separator 21, a first 90-degree polarization rotor 23, a second 90-degree polarization rotor 25, a first hybrid detector 31, a second hybrid detector 33, a third hybrid detector 35, a fourth hybrid detector 37, and a signal processor 39.