Analog FM free-space optical communication based on a mid-infrared quantum cascade laser frequency comb
Applied Physics
2022-04-06 v1 Optics
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 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.
Keywords
Cite
@article{arxiv.2109.09465,
title = {Analog FM free-space optical communication based on a mid-infrared quantum cascade laser frequency comb},
author = {Nicola Corrias and Tecla Gabbrielli and Paolo De Natale and Luigi Consolino and Francesco Cappelli},
journal= {arXiv preprint arXiv:2109.09465},
year = {2022}
}
Comments
17 pages, 13 figures