Correcting photodetector nonlinearity in dual-comb interferometry
| Autor: | Jérôme Genest, Vincent Michaud-Belleau, Alex Tourigny-Plante, Philippe Guay, Nicolas Bourbeau Hébert |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Physics - Instrumentation and Detectors Spectrometer business.industry Detector Photodetector Spectral density FOS: Physical sciences Optical power 02 engineering and technology Instrumentation and Detectors (physics.ins-det) 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) Atomic and Molecular Physics and Optics 010309 optics Interferometry Optics 0103 physical sciences 0210 nano-technology business Absorption (electromagnetic radiation) |
| Popis: | Photodetector nonlinearity, the main limiting factor in terms of optical power in the detection chain, is corrected to improve the signal-to-noise ratio of a short-time measurement in dual-comb spectroscopy. An iterative correction algorithm minimizing out-of-band spectral artifacts based on nonlinearity correction methods used in classical Fourier-transform spectrometers is presented. The exactitude of the nonlinearity correction is validated using a low power linear measurement. Spectroscopic lines of H$^{12}$CN are provided and the error caused by the saturation of the detector is corrected yielding residuals limited by the measurement noise. 10 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|