The QUAD team, in collaboration with Telecom Paris and the C2N laboratory, has demonstrated high bit-rate data transmission in an atmospheric window at 9 µm wavelength. A high frequency Stark effect modulator writes data-bits on a laser beam by shifting the absorption of an optical transition in and out of the laser frequency. Paired with a quantum cascade detector they form a free space optical link allowing for more than 10Gbit s−1 data transmission at room temperature before any equalization.
Front cover Laser & Photonics Reviews 05 Februay 2022
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DOI:10.1002/lpor.202100414
Author affiliation:
Laboratoire de physique de L’École normale supérieure (LPENS, ENS Paris/CNRS/Sorbonne Université/Université de Paris)
Corresponding author: Carlo Sirtori
Communication contact: L’équipe de communication