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Ultra-sensitive heterodyne detection at room temperature in the atmospheric windows.
- Source :
- Nanophotonics (21928606); Apr2024, Vol. 13 Issue 10, p1765-1772, 8p
- Publication Year :
- 2024
-
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 µm and 9 µm. 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- HETERODYNE detection
QUANTUM cascade lasers
ATMOSPHERIC temperature
Subjects
Details
- Language :
- English
- ISSN :
- 21928606
- Volume :
- 13
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Nanophotonics (21928606)
- Publication Type :
- Academic Journal
- Accession number :
- 176873535
- Full Text :
- https://doi.org/10.1515/nanoph-2023-0787