SINGLE-PHOTON INTERFERENCE IN 10 KM LONG OPTICAL-FIBER INTERFEROMETER

P D TOWNSEND, J G RARITY, P R TAPSTER

Research output: Contribution to journalArticle (Academic Journal)

Abstract

Single-photon interference fringes with greater than 90% visibility were measured using a 10 km long optical fibre interferometer. The experiment employed a pulsed semiconductor laser source operating at a wavelength of 1.3 mum and a novel single-photon counting scheme using high-speed germanium avalanche photodiodes. Interferometers of this type could form the basis of future quantum cryptography systems.

Original languageEnglish
Pages (from-to)634-635
Number of pages2
JournalElectronics Letters
Volume29
Issue number7
Publication statusPublished - 1 Apr 1993

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