Optical phase-locked loop for coherent transmission over 500 km using heterodyne detection with fiber lasers

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32 Citations (Scopus)

Abstract

We have developed an optical phase-locked loop (OPLL) that can operate over 500km. The coherent transmitter is a 1.54μm 13C2H 2 frequency-stabilized CW fiber ring laser with a frequency stability of 2.0 × 10-11 and a linewidth of 4kHz. To obtain wide band operation with a bandwidth of 1 GHz, we fabricated a high-speed fiber laser as a local oscillator. By using these fiber lasers, the OPLL circuit successfully generated an intermediate frequency signal with a phase error variance of 7.9 × 10-3 rad.

Original languageEnglish
Pages (from-to)77-81
Number of pages5
JournalIEICE Electronics Express
Volume4
Issue number3
DOIs
Publication statusPublished - 2007

Keywords

  • Coherent transmission
  • Fiber laser
  • Frequency stabilization
  • Optical phase-locked loop

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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