Impact of Raman amplification on a 2 Tb/s coherent WDM system


The impact of hybrid erbium-doped fiber amplifier (EDFA)/Raman amplification on a spectrally efficient coherent-wavelength-division-multiplexed (CoWDM) optical communication system is experimentally studied and modeled. Simulations suggested that 23-dB Raman gain over an unrepeatered span of 124 km single-mode fiber would allow a decrease of the mean input power of ~6 dB for a fixed bit-error rate (BER). Experimentally we demonstrated 1.2-dB Q-factor improvement for a 2-Tb/s seven-band CoWDM with backward Raman amplification. The system delivered an optical signal-to-noise ratio of 35 dB at the output of the receiver preamplifier providing a worst-case BER of 2 × 10 -6 over 49 subcarriers at 42.8 Gbaud, leaving a system margin (in terms of Q -factor) of ~4 dB from the forward-error correction threshold.

Publication DOI:
Additional Information: © 2011 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.
Uncontrolled Keywords: coherent wavelength-division multiplexing,Raman amplification,Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Publication ISSN: 1941-0174
Last Modified: 22 Mar 2024 08:09
Date Deposited: 08 Jan 2013 08:42
Full Text Link: http://ieeexplo ... rnumber=5756219
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2011-04-25
Authors: Frascella, Paola
Antony, Cleitus
Fabbri, Simon J. (ORCID Profile 0000-0003-1858-4211)
Garcia Gunning, Fatima C.
Gunning, Paul
McAuliffe, William
Cassidy, Derek
Ellis, Andrew D. (ORCID Profile 0000-0002-0417-0547)



Version: Accepted Version

Export / Share Citation


Additional statistics for this record