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15 June 2023 Progress in high-speed optical links in the 8 to 12µm thermal atmospheric window from the perspective of unipolar quantum technology
Pierre Didier, Hamza Dely, Olivier Spitz, Thomas Bonazzi, Elie Awwad, Etienne Rodriguez, Angela Vasanelli, Carlo Sirtori, Frédéric Grillot
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Proceedings Volume 12515, Laser Technology for Defense and Security XVIII; 1251507 (2023) https://doi.org/10.1117/12.2663847
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
Lack of critical communication components (external modulators, high-sensitivity detectors, amplifiers) has long hindered the development of high-speed free-space transmission in the 8-12 μm thermal atmospheric window. Unipolar quantum technology has emerged as a game-changer by developing key elements that outperform conventional direct-modulation schemes in terms of performance. In particular, we demonstrated a free-space communication at 30 Gbits/s. High-speed modulation of the 9 μm-wavelength beam from a quantum cascade laser is implemented with a Stark-effect external modulator while fast detection relies on a quantum well infrared photodetector. In between, a multi-pass cell allows increasing the propagation distance to 31 meters.
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Pierre Didier, Hamza Dely, Olivier Spitz, Thomas Bonazzi, Elie Awwad, Etienne Rodriguez, Angela Vasanelli, Carlo Sirtori, and Frédéric Grillot "Progress in high-speed optical links in the 8 to 12µm thermal atmospheric window from the perspective of unipolar quantum technology", Proc. SPIE 12515, Laser Technology for Defense and Security XVIII, 1251507 (15 June 2023); https://doi.org/10.1117/12.2663847
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KEYWORDS
Mid-IR
Quantum cascade lasers
Quantum well infrared photodetectors
Optical transmission
Free space optics
Quantum technologies
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