Bessin, Florent;
Ferreira, Filipe M;
Doran, Nick J;
Gordienko, Vladimir;
(2025)
Polarization-Insensitive Fiber Optical Parametric Amplifier with Noise Figure down to 4.4 dB enabled by Mach-Zehnder Architecture.
Journal of Lightwave Technology
10.1109/jlt.2025.3638962.
(In press).
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Abstract
We demonstrate a Mach-Zehnder (MZ) architecture for polarization-insensitive (PI) fiber optical parametric amplifiers (FOPA) and confirm that it improves both noise figure and nonlinear crosstalk as compared to PI-FOPAs employing a polarization diversity loop. We characterize the MZ PI-FOPA by employing it to amplify 17x100 GHz-spaced WDM channels including a 35 GBaud PDM-QPSK signal between 1528.0 and 1540.56 nm with a net gain between 15.5 and 24 dB. We demonstrate the record low PI-FOPA noise figure down to 4.4 dB, and a noise figure below 6 dB across all amplified channels for the total signal output power up to 13 dBm. The latter demonstrates an improvement in the nonlinear crosstalk tolerance by ∼7 dB as compared to previously reported looped PI-FOPAs.
| Type: | Article |
|---|---|
| Title: | Polarization-Insensitive Fiber Optical Parametric Amplifier with Noise Figure down to 4.4 dB enabled by Mach-Zehnder Architecture |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/jlt.2025.3638962 |
| Publisher version: | https://doi.org/10.1109/jlt.2025.3638962 |
| 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 fibers, Gain, Optical fiber polarization, Wavelength division multiplexing, Stimulated emission, Optical pumping, Nonlinear optics, Optical polarization, Optical fiber communication |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10218653 |
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