Nonlinear Noise of Low Transmission Penalty Dual-Stage Discrete Raman Amplifier


We experimentally characterise the linear and nonlinear performance of a >70nm, dual-stage, 19.5dB average net gain discrete Raman amplifier using different nonlinear fibres in the second stage. We propose an architecture built with a combination of IDF and SMF, and compare its performance with amplifiers built with conventionally used nonlinear fibre types (IDF-IDF, IDF-DCF). The measured FWM product power shows the IDF-SMF architecture to generate less nonlinear interference when compared to other schemes. We test the amplifiers with 5x120Gb/s DP-QPSK WDM signals in a recirculating loop at 10 recirculations of 93.4km SMF fibre, where the power sweep shows up to 2dB optimum launch power difference, with the maximum Q2 factor varying by up to 1.6dB. Using the optimum transmission point we measure a Q2=8.8dB at 35 recirculations of 93.4km transmission (3269km) with the proposed IDF-SMF scheme, which is >460km further than the other tested architectures. All characterised schemes performed similarly in the linear noise regime.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Funding: EPSRC project EP/M009092/1 (ToM3).
Uncontrolled Keywords: Discrete Raman Amplification, Broadband Transmission, Nonlinearity Characterisation
Publication ISSN: 1941-0174
Last Modified: 26 Feb 2024 08:26
Date Deposited: 22 Oct 2018 09:08
PURE Output Type: Article
Published Date: 2018-11-20
Published Online Date: 2018-10-31
Accepted Date: 2018-10-18
Authors: Krzczanowicz, Lukasz (ORCID Profile 0000-0002-8705-9261)
Iqbal, Md Asif (ORCID Profile 0000-0001-7267-5865)
Phillips, Ian D (ORCID Profile 0000-0002-2776-8939)
Al-Khateeb, Mohammad
Tan, Mingming (ORCID Profile 0000-0002-0822-8160)
Harper, Paul (ORCID Profile 0000-0002-9495-9911)
Forysiak, Wladek (ORCID Profile 0000-0001-5411-1193)



Version: Accepted Version

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