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Analog FM free-space optical communication based on a mid-infrared quantum cascade laser frequency comb

Authors :
Corrias, Nicola
Gabbrielli, Tecla
De Natale, Paolo
Consolino, Luigi
Cappelli, Francesco
Publication Year :
2021

Abstract

Quantum cascade laser frequency combs are nowadays well-appreciated sources for infrared spectroscopy. Here their applicability for free-space optical communication is demonstrated. The spontaneously-generated intermodal beat note of the frequency comb is used as carrier for transferring the analog signal via frequency modulation. Exploiting the atmospheric transparency window at 4 $\mu$m, an optical communication with a signal-to-noise ratio up to 65 dB is realized, with a modulation bandwidth of 300 kHz. The system tolerates a maximum optical attenuation exceeding 35 dB. The possibility of parallel transmission of an independent digital signal via amplitude modulation at 5 MS/s is also demonstrated.<br />Comment: 17 pages, 13 figures

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2109.09465
Document Type :
Working Paper
Full Text :
https://doi.org/10.1364/OE.443483