10 Gbit s −1 Free Space Data Transmission at 9 µm Wavelength With Unipolar Quantum Optoelectronics (Laser Photonics Rev. 16(2)/2022)

This is the authors' abstract. We don't add key points for this paper.

Stark Effect Modulator Carlo Sirtori and colleagues present a high frequency Stark effect modulator in article number 2100414, which 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 10Gbit s−1 data transmission at room temperature before any equalization.