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First Experimental Mach-Zehnder FOPA for Polarization-and Wavelength-Division-Multiplexed Signals

Bessin, F; Gordienko, V; Ferreira, FM; Doran, N; (2021) First Experimental Mach-Zehnder FOPA for Polarization-and Wavelength-Division-Multiplexed Signals. In: 2021 European Conference on Optical Communication, ECOC 2021. IEEE Green open access

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Abstract

Fiber optical parametric amplifiers (FOPA) have been widely studied for a few decades due to their abilities to provide wide bandwidth gain [1], ultra-low noise figure [2] and arbitrary wavelength range operation [3]. However, one of the major issues of FOPA is their polarization dependent gain. To overcome this issue, different technics have been investigated such as half pass loop FOPA that as demonstrate great results [4]. In this configuration both polarization components of the input signal propagate in opposite direction in the FOPA loop. Thus, each polarization of the input signal can be amplified independently. Nevertheless, these signal components pass first through a loss section accumulating small nonlinear crosstalk and then through a gain section, or vice-versa – with stronger nonlinear crosstalk limiting the FOPA performance [5]–[6]. In this paper, we demonstrate for the first time to our knowledge a promising polarization insensitive (PI-)FOPA based on a Mach-Zehnder (MZ) architecture that gets rid of these passive sections, inherent to half pass loop FOPA and responsible for losses and crosstalk. Indeed, in MZ configuration an input signal is first split into two single-polarization components, each one propagating in one of the two arms of the MZ (each containing an independent gain section), and finally recombined. We show in particular that we can amplify DWDM signals in C-band with a gain >10 dB, using signal amplification of 100G PDM-QPSK signals supplied by a Ciena transponder WaveLogic 3.

Type: Proceedings paper
Title: First Experimental Mach-Zehnder FOPA for Polarization-and Wavelength-Division-Multiplexed Signals
Event: 2021 European Conference on Optical Communication (ECOC)
Dates: 13 Sep 2021 - 16 Sep 2021
ISBN-13: 9781665438681
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ECOC52684.2021.9605811
Publisher version: https://doi.org/10.1109/ECOC52684.2021.9605811
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Optical fiber amplifiers, Optical losses, Optical fiber polarization, Optical polarization, Stimulated emission, Wavelength division multiplexing, Optical crosstalk
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10142924
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