Experimental evaluation of impairments in unrepeatered DP-16QAM link with distributed raman amplification


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.

Publication DOI: https://doi.org/10.3390/photonics4010016
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Funding: EU projects ICONE, gr. # 608099, GRIFFON, gr. # 324391 and Vetenskapsrädet PHASE, gr. #2016-04510.
Uncontrolled Keywords: Coherent communications,Fiber optics communications,Raman amplification,Radiology Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics
Publication ISSN: 1749-4885
Last Modified: 27 Jun 2024 09:19
Date Deposited: 23 Oct 2017 10:15
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-03-08
Accepted Date: 2017-03-06
Submitted Date: 2017-01-13
Authors: Pang, Xiaodan
Ozolins, Oskars
El-Taher, Atalla
Schatz, Richard
Jacobsen, Gunnar
Sergeyev, Sergey (ORCID Profile 0000-0002-1515-5019)
Popov, Sergei



Version: Published Version

License: Creative Commons Attribution

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