Sub-shot-noise-limit discrimination of on-off keyed coherent signals via a quantum receiver with a superconducting transition edge sensor

Kenji Tsujino, Daiji Fukuda, Go Fujii, Shuichiro Inoue, Mikio Fujiwara, Masahiro Takeoka, Masahide Sasaki

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

We demonstrate a sub-shot-noise-limit discrimination of on-off keyed coherent signals by an optimal displacement quantum receiver in which a superconducting transition edge sensor is installed. Use of a transition edge sensor and a fiber beam splitter realizes high total detection efficiency and high interference visibility of the receiver and the observed average error surpasses the shot-noise-limit in a wider range of the signal power. Our technique opens up a new technology for the sub-shot-noiselimit detection of coherent signals in optical communication channels.

Original languageEnglish
Pages (from-to)8107-8114
Number of pages8
JournalOptics Express
Volume18
Issue number8
DOIs
Publication statusPublished - 2010 Apr 12
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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