DAYLIGHT DEMONSTRATION OF A LOW-LIGHT-LEVEL COMMUNICATION-SYSTEM USING CORRELATED PHOTON PAIRS

S F SEWARD, P R TAPSTER, J G WALKER, J G RARITY

Research output: Contribution to journalLetter (Academic Journal)peer-review

Abstract

We demonstrate optical communication in free space at light levels much lower than that of ambient light. The method uses the highly time correlated nature of the photon pairs produced by non-degenerate parametric downconversion. Information was transmitted a distance of 200 m in daylight when the received signal intensity was only 0.14% of the detected background light level.

Original languageEnglish
Pages (from-to)201-207
Number of pages7
JournalQuantum Optics
Volume3
Issue number4
Publication statusPublished - Aug 1991

Structured keywords

  • Photonics and Quantum

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