Asymmetry Optimization for 10 THz OPC Transmission over the C + L Bands Using Distributed Raman Amplification

Paweł Rosa, Giuseppe Rizzelli Martella, Juan Diego Ania Castañón, Mingming Tan

Research output: Contribution to journalArticlepeer-review


An optimized design for a broadband Raman optical amplifier in standard single-mode fiber covering the C and L bands is presented, to be used in combination with wideband optical phase conjugation (OPC) nonlinearity compensation. The use of two Raman pumps and fiber Bragg grating reflectors at different wavelengths for the transmitted (C band) and conjugated (L band) WDM channels is proposed to extend bandwidth beyond the limits imposed by single-wavelength pumping, for a total 10 THz. Optimization of pump and reflector wavelength, as well as pump powers, allows us to achieve low asymmetry across the whole transmission band for optimal nonlinearity compensation. System performance is simulated to estimate OSNR, gain flatness and nonlinear Kerr distortion.
Original languageEnglish
Article number2906
Number of pages13
Issue number6
Early online date7 Mar 2023
Publication statusPublished - 7 Mar 2023

Bibliographical note

Copyright © 2023 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 (

Funding Information:
This research was funded by the Polish Ministry of Science and Higher Education Grant 12300051, UK Engineering and Physical Sciences Research Council (EPSRC) Grant EP/V000969/1 (ARGON), Royal Society International Exchange Grant (IEC\NSFC\211244), Spanish MICINN grant PID2021-128000OB-C21 (PRECISION) and Comunidad de Madrid Grant S2018/NMT-4326 (SINFOTON2-CM).


  • Raman amplification
  • optical fiber communications
  • optical phase conjugation


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