@ARTICLE {33189,
author={F. P. Guiomar and M.  Fernandes and J.  Nascimento and V.  Rodrigues and P. Monteiro},
doi={10.1109/JLT.2022.3164736},
journal={Journal of Lightwave Technology},
title={Coherent Free-Space Optical Communications: Opportunities and Challenges},
year={2022},
month={May},
volume={40},
number={10},
pages={3173-3186},
ISSN={0733-8724}
}