Noise Performance Improvement of Broadband Discrete Raman Amplifiers Using Dual Stage Distributed Pumping Architecture

Md Asif Iqbal*, Lukasz Krzczanowicz, Ian D. Philips, Paul Harper, Wladek Forysiak

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We demonstrate a novel design of dual stage backward pumped broadband discrete Raman amplifier with distributed pumping architecture which improves the short wavelength noise performance compared with conventional backward pumped single stage design. Overall noise figure (NF) performance has been improved by 2.8 dB over 70 nm bandwidth without introducing forward pumping. Nonlinear phase shift has been numerically calculated and compared with single stage design to evaluate the overall performance improvement. Finally, we report that our proposed dual stage design with ∼14 dB net gain improves low wavelength NF by 3.3 dB providing 1.2 dB Q2 factor improvement and 1134 km reach extension versus a conventional single stage design for 18 × 120 Gb/s PM-QPSK transmission.

Original languageEnglish
Article number8723558
Pages (from-to)3665-3671
Number of pages7
JournalJournal of Lightwave Technology
Volume37
Issue number14
Early online date28 May 2019
DOIs
Publication statusPublished - 15 Jul 2019

Bibliographical note

This work was supported by UK EPSRC under Grant ToM3 (EP/M009092/1)

Keywords

  • Amplifier noise
  • broadband amplifiers
  • optical fibre amplifiers
  • optical fibre communication
  • Raman scattering

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