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

Pang, Xiaodan, Ozolins, Oskars, El-Taher, Atalla, Schatz, Richard, Jacobsen, Gunnar, Sergeyev, Sergey and Popov, Sergei (2017). Experimental evaluation of impairments in unrepeatered DP-16QAM link with distributed raman amplification. Photonics, 4 (1),

Abstract

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: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
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
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Related URLs: http://www.scopus.com/inward/record.url?scp=85030865029&partnerID=8YFLogxK (Scopus URL)
Published Date: 2017-03-08
Authors: Pang, Xiaodan
Ozolins, Oskars
El-Taher, Atalla
Schatz, Richard
Jacobsen, Gunnar
Sergeyev, Sergey ( 0000-0002-1515-5019)
Popov, Sergei

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