Temporal encoding to reject background signals in a low complexity, photon counting communication link

Research output: Contribution to journalArticle

Abstract

Communicating information at the few photon level typically requires some complexity in the transmitter or receiver in order to operate in the presence of noise. This in turn incurs expense in the necessary spatial volume and power consumption of the system. In this work we present a self-synchronised free-space optical communications system based on simple, compact and low power consumption semiconductor devices. A temporal encoding method, implemented using a gallium nitride micro-LED source and a silicon single photon avalanche photo-detector (SPAD) demonstrates data transmission at rates up to 100~kb/s for 8.25~pW received power, corresponding to 27 photons per bit. Furthermore, the signals can be decoded in the presence of both constant and modulated background noise at levels significantly exceeding the signal power. The system’s low power consumption and modest electronics requirements are demonstrated employing it as a communications channel between two nano-satellite simulator systems.
LanguageEnglish
Article number1671
Number of pages14
JournalMaterials
Volume11
Issue number9
DOIs
Publication statusPublished - 9 Sep 2018

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Telecommunication links
Electric power utilization
Photons
Satellite simulators
Gallium nitride
Silicon
Optical communication
Semiconductor devices
Data communication systems
Light emitting diodes
Light sources
Transmitters
Communication systems
Electronic equipment
Detectors
gallium nitride

Keywords

  • LED
  • GaN device
  • single-photon avalanche diodes
  • optical communication
  • CubeSat

Cite this

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title = "Temporal encoding to reject background signals in a low complexity, photon counting communication link",
abstract = "Communicating information at the few photon level typically requires some complexity in the transmitter or receiver in order to operate in the presence of noise. This in turn incurs expense in the necessary spatial volume and power consumption of the system. In this work we present a self-synchronised free-space optical communications system based on simple, compact and low power consumption semiconductor devices. A temporal encoding method, implemented using a gallium nitride micro-LED source and a silicon single photon avalanche photo-detector (SPAD) demonstrates data transmission at rates up to 100~kb/s for 8.25~pW received power, corresponding to 27 photons per bit. Furthermore, the signals can be decoded in the presence of both constant and modulated background noise at levels significantly exceeding the signal power. The system’s low power consumption and modest electronics requirements are demonstrated employing it as a communications channel between two nano-satellite simulator systems.",
keywords = "LED, GaN device, single-photon avalanche diodes, optical communication, CubeSat",
author = "Griffiths, {Alexander D.} and Johannes Herrnsdorf and Christopher Lowe and Malcolm Macdonald and Robert Henderson and Strain, {Michael J.} and Dawson, {Martin D.}",
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AU - Griffiths, Alexander D.

AU - Herrnsdorf, Johannes

AU - Lowe, Christopher

AU - Macdonald, Malcolm

AU - Henderson, Robert

AU - Strain, Michael J.

AU - Dawson, Martin D.

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AB - Communicating information at the few photon level typically requires some complexity in the transmitter or receiver in order to operate in the presence of noise. This in turn incurs expense in the necessary spatial volume and power consumption of the system. In this work we present a self-synchronised free-space optical communications system based on simple, compact and low power consumption semiconductor devices. A temporal encoding method, implemented using a gallium nitride micro-LED source and a silicon single photon avalanche photo-detector (SPAD) demonstrates data transmission at rates up to 100~kb/s for 8.25~pW received power, corresponding to 27 photons per bit. Furthermore, the signals can be decoded in the presence of both constant and modulated background noise at levels significantly exceeding the signal power. The system’s low power consumption and modest electronics requirements are demonstrated employing it as a communications channel between two nano-satellite simulator systems.

KW - LED

KW - GaN device

KW - single-photon avalanche diodes

KW - optical communication

KW - CubeSat

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