@inproceedings{4c81633c3f964304817b821237aa4684,
title = "Mitigation of Turbulence-Induced Power Fading in 200G FSO Link Using a Semiconductor Optical Amplifier",
abstract = "We performed a wavelength division multiplexing (WDM) free space optical (FSO) transmission experiment with four channels spaced by 100 GHz in the C band. Each channel consisted of a 25 GBaud signal using on-off keying or 4-level pulse amplitude modulation (PAM4), creating a WDM system with 100 or 200 Gbit/s total capacity, respectively. The FSO link included a rotating platform holding a disk with imprinted micro-patterns to emulate atmospheric turbulence induced attenuation. The emulated turbulence resulted in power drops below the receiver sensitivity for PAM4 around 19\% of the time for a bit error ratio of 1e-2. The use of a semiconductor optical amplifier operating close to saturation before the photodetection helped reduce the percentage of power drops below the receiver sensitivity limit to around 7\% without the need of feedback or active bias control.",
keywords = "Free Space Optics, Semiconductor Optical Amplifier, Turbulence, Wavelength Division Multiplexing",
author = "M. Troncoso-Costas and Reza, \{A. Galib\} and A. Naughton and J. Browne and K. O'Dwyer and Michael Wallace and D. Mackey and N. Devaney and Liam Barry and C. Browning",
note = "Publisher Copyright: {\textcopyright} 2025 ESA and CNES.; 2024 International Conference on Space Optics, ICSO 2024 ; Conference date: 21-10-2024 Through 25-10-2024",
year = "2025",
doi = "10.1117/12.3075357",
language = "English",
isbn = "9781510693470",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Frederic Bernard and Nikos Karafolas and Philippe Kubik and Kyriaki Minoglou",
booktitle = "International Conference on Space Optics, ICSO 2024",
}