Next Article in Journal
Correlating Synthesis Parameters to Morphological Entities: Predictive Modeling of Biopolymer Aerogels
Next Article in Special Issue
Effects of a Si-doped InGaN Underlayer on the Optical Properties of InGaN/GaN Quantum Well Structures with Different Numbers of Quantum Wells
Previous Article in Journal
The Effect of Crystal Defects on 3D High-Resolution Diffraction Peaks: A FFT-Based Method
Previous Article in Special Issue
Porous AlGaN-Based Ultraviolet Distributed Bragg Reflectors
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Materials 2018, 11(9), 1671; https://doi.org/10.3390/ma11091671

Temporal Encoding to Reject Background Signals in a Low Complexity, Photon Counting Communication Link

1
Institute of Photonics, University of Strathclyde, Glasgow G1 1RD, UK
2
Department of Mechanical & Aerospace Engineering, University of Strathclyde, Glasgow G1 1XJ, UK
3
CMOS Sensors & Systems Group, University of Edinburgh, Edinburgh EH9 3JL, UK
*
Author to whom correspondence should be addressed.
Received: 14 August 2018 / Revised: 29 August 2018 / Accepted: 6 September 2018 / Published: 9 September 2018
(This article belongs to the Special Issue III-Nitrides Semiconductor Research in the UK and Ireland)
Full-Text   |   PDF [2678 KB, uploaded 11 September 2018]   |  

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 by employing it as a communications channel between two nano-satellite simulator systems. View Full-Text
Keywords: LED; GaN; single-photon avalanche diode; optical communications; CubeSats LED; GaN; single-photon avalanche diode; optical communications; CubeSats
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Griffiths, A.D.; Herrnsdorf, J.; Lowe, C.; Macdonald, M.; Henderson, R.; Strain, M.J.; Dawson, M.D. Temporal Encoding to Reject Background Signals in a Low Complexity, Photon Counting Communication Link. Materials 2018, 11, 1671.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top