Improved WDM performance of a fibre optical parametric amplifier using Raman-assisted pumping

M.F.C. Stephens, I.D. Phillips, P. Rosa, P. Harper, N.J. Doran

Research output: Contribution to journalArticle

Abstract

We experimentally demonstrate a Raman-Assisted Fibre Optical Parametric Amplifier (RA-FOPA) with 20dB net gain using wavelength division multiplexed signals. We report amplification of 10×58Gb/s 100GHz-spaced QPSK signals and show that by appropriate tuning of the parametric pump power and frequency, gain improvement of up to 5dB can be achieved for the RA-FOPA compared with combined individual contributions from the parametric and Raman pumps. We compare the RAFOPA with an equivalent-gain conventional FOPA and find that four-wave mixing crosstalk is substantially reduced by up to 5.8 ± 0.4dB using the RA-FOPA. Worst-case performance penalty of the RA-FOPA is found to be only 1.0 ± 0.2dB over all measured OSNRs, frequencies and input powers, making it an attractive proposal for future communications systems.

Original languageEnglish
Pages (from-to)902-911
Number of pages10
JournalOptics Express
Volume23
Issue number2
DOIs
Publication statusPublished - 14 Jan 2015

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parametric amplifiers
light amplifiers
pumping
fibers
pumps
quadrature phase shift keying
crosstalk
penalties
four-wave mixing
division
proposals
telecommunication
tuning
wavelengths

Bibliographical note

Funding: UK EPSRC under grant EP/J009709/2.

Cite this

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abstract = "We experimentally demonstrate a Raman-Assisted Fibre Optical Parametric Amplifier (RA-FOPA) with 20dB net gain using wavelength division multiplexed signals. We report amplification of 10×58Gb/s 100GHz-spaced QPSK signals and show that by appropriate tuning of the parametric pump power and frequency, gain improvement of up to 5dB can be achieved for the RA-FOPA compared with combined individual contributions from the parametric and Raman pumps. We compare the RAFOPA with an equivalent-gain conventional FOPA and find that four-wave mixing crosstalk is substantially reduced by up to 5.8 ± 0.4dB using the RA-FOPA. Worst-case performance penalty of the RA-FOPA is found to be only 1.0 ± 0.2dB over all measured OSNRs, frequencies and input powers, making it an attractive proposal for future communications systems.",
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Improved WDM performance of a fibre optical parametric amplifier using Raman-assisted pumping. / Stephens, M.F.C.; Phillips, I.D.; Rosa, P.; Harper, P.; Doran, N.J.

In: Optics Express, Vol. 23, No. 2, 14.01.2015, p. 902-911.

Research output: Contribution to journalArticle

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AU - Stephens, M.F.C.

AU - Phillips, I.D.

AU - Rosa, P.

AU - Harper, P.

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