Quantum detection of wavelength-division-multiplexing optical coherent signals

Atsushi Waseda, Masahiro Takeoka, Masahide Sasaki, Mikio Fujiwara, Hidema Tanaka

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We numerically evaluate the transmission rates of a single fiber with the wavelength-division-multiplexing (WDM) transmission of coherent signals with conventional homodyne-based (dyne-type) detections and various quantum detection strategies. We reveal the quantitative gap between these detection strategies especially in the quantum-limited region where the quantum noise seriously limits the transmission rate. For an extremely weak signal input power, there is a crucial gap between the capacity limit and the transmission rates of the WDM system with dyne-type detections. We show that this gap is filled by applying a collective square root detection (SRD) only for each channel, not necessary for quantum collective decoding among WDM channels.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Issue number2
Publication statusPublished - 2010 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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