Low cost timing interval analyzers for quantum key distribution

Richard Nock*, Naim Dahnoun, John Rarity

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication

Abstract

The Bristol free space Quantum Key Distribution (QKD) system offers a potential solution to possible future security problems. Within the Bristol QKD system there is no shared clock between Alice, intended to be a mobile phone chipset and Bob the Quantum Automatic Teller Machine (QATM). Therefore instead of sharing a clock, a Timing Interval Analyzer is used to timestamp all incident photons in Bob. As Alice's repetition rate is fixed and known, it is possible to distinguish Alice's photons from that of dark counts and ambient light. The TIA produced in house to do this time stamping process has a resolution of 30.5 picoseconds and a single shot RMS measurement error of 35.2 picoseconds, whilst using off the shelf components. Although the TIA is used within a QKD system it has wider applications within other photonics experiments in particular that of time correlated single photon counting (TCSPC).

Original languageEnglish
Title of host publication2011 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2011 - Proceedings
PublisherIEEE
Pages475-479
Number of pages5
ISBN (Print)9781424479351
DOIs
Publication statusPublished - 7 Jul 2011
Event2011 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2011 - Binjiang, Hangzhou, China
Duration: 10 May 201112 May 2011

Publication series

NameConference Record - IEEE Instrumentation and Measurement Technology Conference
ISSN (Print)1091-5281

Conference

Conference2011 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2011
CountryChina
CityBinjiang, Hangzhou
Period10/05/1112/05/11

Keywords

  • Instrumentation and measurement
  • Measurement techniques
  • Pulse measurements
  • Time measurement

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