Near-noiseless amplification of light by a phase-sensitive fibre amplifier

Dmitry Levandovsky*, Michael Vasilyev, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


The near-noiseless optical amplification of laser light in a phase-sensitive fiber amplifier (PSA) was reported. It provided a noise figure of 1.2 dB with a gain of 1.7 dB. This was found to be an improvement over the conventional laser amplifier which had a theoretical limit of noise figure of 1.2 dB. The positive gain regime was investigated where the fiber PSA was used to boost the signal power.

Original languageEnglish (US)
Pages (from-to)281-285
Number of pages5
JournalPramana - Journal of Physics
Issue number2-3
StatePublished - Jan 1 2001


  • Fiber optics
  • Parametric amplifier
  • Sagnac interferometer

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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