Performance evaluation of discrete Raman amplifiers in coherent transmission systems


We evaluate the performance penalty due to discrete Raman amplifier (DRA) in a long haul WDM transmission system. The investigation was primarily performed to study the impact of the accumulated nonlinear noise due to fibre chromatic dispersion and nonlinear coefficient(γ). Nonlinear fibres such as inverse dispersion fibre (IDF), dispersion compensation fibre (DCF) and a development fibre known as the Corning Raman fibre (CRF) with the opposite sign of CD to the other two, were taken as the gain fibre in the DRA stage of the long-haul transmission setup. To study the performance penalty with these Raman gain fibres a 30 GBaud 120 Gb/s DP-QPSK channel @1550 nm was combined with 9 spectrally shaped 50 GHz amplified spontaneous emission (ASE) channels for transmission over a recirculation loop with a per loop length of 63 km single mode fibre (SMF). Our modelling and experimental results show that a fibre with positive dispersion >10ps/nm/km and a nonlinear coefficient of ∼ 4W−1km−1 is a good choice of gain fibre for DRA-assisted coherent transmission system.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2022. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funding Information H2020 Marie Skłodowska-Curie Actions (814276); Engineering and Physical Sciences Research Council (EP/V000969/1); Engineering and Physical Sciences Research Council (EP/M009092/1).
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Last Modified: 24 Apr 2024 17:06
Date Deposited: 01 Dec 2022 15:47
Full Text Link:
Related URLs: https://opg.opt ... 43053&id=518936 (Publisher URL)
PURE Output Type: Article
Published Date: 2022-11-21
Accepted Date: 2022-10-13
Authors: Hazarika, Pratim (ORCID Profile 0000-0003-2515-9782)
Tan, Mingming (ORCID Profile 0000-0002-0822-8160)
Iqbal, Md Asif (ORCID Profile 0000-0001-7267-5865)
Phillips, Ian (ORCID Profile 0000-0002-2776-8939)
Harper, Paul (ORCID Profile 0000-0002-9495-9911)
Stone, Jeffery S.
Li, Ming Jun
Forysiak, Wladek (ORCID Profile 0000-0001-5411-1193)



Version: Published Version

License: Creative Commons Attribution

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