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

Xiaodan Pang; Oskars Ozolins; Atalla El-Taher; Richard Schatz; Gunnar Jacobsen; Sergey Sergeyev; Sergei Popov

doi:10.3390/photonics4010016

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

Xiaodan Pang, Oskars Ozolins, Atalla El-Taher^*, Richard Schatz, Gunnar Jacobsen, Sergey Sergeyev, Sergei Popov

^*Corresponding author for this work

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Number of pages	8
Journal	Nature Photonics
Volume	4
Issue number	1
DOIs	https://doi.org/10.3390/photonics4010016
Publication status	Published - 8 Mar 2017

Bibliographical note

© 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.

Keywords

Coherent communications
Fiber optics communications
Raman amplification

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10.3390/photonics4010016

Experimental Evaluation of Impairments
© 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/).
Final published version, 2.88 MBLicence: CC BY 3.0

Cite this

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title = "Experimental evaluation of impairments in unrepeatered DP-16QAM link with distributed raman amplification",

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.",

keywords = "Coherent communications, Fiber optics communications, Raman amplification",

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AU - Pang, Xiaodan

AU - Ozolins, Oskars

AU - El-Taher, Atalla

AU - Schatz, Richard

AU - Jacobsen, Gunnar

AU - Sergeyev, Sergey

AU - Popov, Sergei

N1 - © 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.

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N2 - 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.

AB - 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.

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

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Keywords

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