Title:
量子通信システムのための送信機、量子通信システム、及び強度変調された光子パルスを生成する方法
Document Type and Number:
Japanese Patent JP6833883
Kind Code:
B2
Abstract:
A transmitter for a quantum communication system has a photon source unit 1 comprising a photon source. The photon source unit may be configured to emit light pulses having a first intensity and a second intensity. A first intensity modulator is configured to receive an input light pulse from the photon source unit. The first intensity modulator comprises a first element 2 which is configured to split the input light pulse into two components, a phase modulator 3 configured to apply a phase shift between the two components, and a second element 4 configured to interfere the two components. The first intensity modulator may output light pulses having three or more different intensities. At least one of the first element and the second element are asymmetric. The first or second elements may comprise an asymmetric beam splitter, a tuneable ratio splitter or a polarising beam splitter. The transmitter may be configured to implement decoy state quantum communication.
Inventors:
Marco Luca Marini
Gillian Yuan
Taofik Paraiso
James Dines
Andrew James Shields
Gillian Yuan
Taofik Paraiso
James Dines
Andrew James Shields
Application Number:
JP2019028609A
Publication Date:
February 24, 2021
Filing Date:
February 20, 2019
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G02F3/00; G02F1/21; H04B10/516; H04B10/70; H04L9/12
Domestic Patent References:
| JP2007286551A | ||||
| JP2012063701A | ||||
| JP2015094812A | ||||
| JP2016042694A | ||||
| JP2017046044A | ||||
| JP2010231059A | ||||
| JP2006345354A |
Foreign References:
| WO2016149749A1 | ||||
| WO2012039595A1 | ||||
| CN106533676A | ||||
| US20120128350 | ||||
| WO2003003104A1 |
Attorney, Agent or Firm:
Kurata Masatoshi
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Tadashi Inoue
Sanae Kaneko
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Tadashi Inoue
Sanae Kaneko