Ultra-sensitive heterodyne detection at room temperature in the atmospheric windows
Authors:
- Mohammadreza SaemianMSMohammadreza Saemian
- Livia Del BalzoLBLivia Del Balzo
- Djamal GacemiDGDjamal Gacemi
- Yanko TodorovYTYanko Todorov
- Etienne RodriguezEREtienne Rodriguez
- Olivier LopezOLOlivier Lopez
- Benoît DarquiéBDBenoît Darquié
- Lianhe LiLLLianhe Li
- Alexander Giles DaviesADAlexander Giles Davies
- Edmund LinfieldELEdmund Linfield
- Angela VasanelliAVAngela Vasanelli
- Carlo SirtoriCSCarlo Sirtori
Preprint
Abstract
We report room temperature heterodyne detection of a quantum cascade laser beaten with a local oscillator on a unipolar quantum photodetector in two different atmospheric windows, at 4.8 $μ$m and 9 $μ$m. A noise equivalent power of few pW is measured by employing an active stabilization technique in which the local oscillator and the signal are locked in phase. The measured heterodyne noise equivalent power is six orders of magnitude lower than that obtained with direct detection.Keywords
All Related Versions
- Version 1, 2024-12-23, ArXiv
- Published version: Nanophotonics, 13 (10), 1765.
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