Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse

Rupesh Kumar, Adrian Wonfor, Richard Penty, Tim Spiller, Ian White

Research output: Contribution to journalArticle

Abstract

Advances in highly sensitive detection techniques for classical coherent communication systems have reduced the received signal power requirements to a few photons per bit. At this level one can take advantage of the quantum noise to create secure communication, using continuous variable quantum key distribution (CV-QKD). In this work therefore we embed CV-QKD signals within classical signals and transmit classical data and secure keys simultaneously over 25 km of optical fibre. This is achieved by using a novel coherent displacement state generator, which has the potential for being used in a wide range of quantum optical experiments. This approach removes the need for separate channels for quantum communication systems and allows reduced system bandwidth for a given communications specification. This demonstration therefore demonstrates a way of implementing direct quantum physical layer security within a conventional classical communications system, offering a major advance in term of practical and low cost implementation.

Original languageEnglish
Article number11190
Pages (from-to)11190
Number of pages1
JournalScientific Reports
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Aug 2019

ASJC Scopus subject areas

  • General

Cite this

Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse. / Kumar, Rupesh; Wonfor, Adrian; Penty, Richard; Spiller, Tim; White, Ian.

In: Scientific Reports, Vol. 9, No. 1, 11190, 01.08.2019, p. 11190.

Research output: Contribution to journalArticle

Kumar, Rupesh ; Wonfor, Adrian ; Penty, Richard ; Spiller, Tim ; White, Ian. / Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse. In: Scientific Reports. 2019 ; Vol. 9, No. 1. pp. 11190.
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