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Experimental evaluation of impairments in unrepeatered DP-16QAM link with distributed raman amplification
RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
RISE - Research Institutes of Sweden, ICT, Acreo.
Aston University, UK.
KTH Royal Institute of Technology, Sweden.
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2017 (English)In: Photonics, ISSN 2304-6732, Vol. 4, no 1, article id 16Article in journal (Refereed) Published
Abstract [en]

The transmission impairments of a Raman amplified link using dual-polarization 16-quadrature amplitude modulation (DP-16QAM) are experimentally characterized. The impact of amplitude and phase noise on the signal due to relative intensity noise (RIN) transfer from the pump are compared for two pumping configurations: first-order backward pumping and bi-directional pumping. Experimental results indicate that with increased Raman backward pump power, though the optical signal-to-noise ratio (OSNR) is increased, so is the pump-induced amplitude and phase noise. The transmission performance is firstly improved by the enhanced OSNR at a low pump power until an optimum point is reached, and then the impairments due to pump-induced noise start to dominate. However, the introduction of a low pump power in the forward direction can further improve the system's performance.

Place, publisher, year, edition, pages
2017. Vol. 4, no 1, article id 16
Keyword [en]
Coherent communications, Fiber optics communications, Raman amplification
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-32530DOI: 10.3390/photonics4010016Scopus ID: 2-s2.0-85030865029OAI: oai:DiVA.org:ri-32530DiVA: diva2:1155549
Note

Funding details: Knut och Alice Wallenbergs Stiftelse

Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2018-01-13Bibliographically approved

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