Understanding photodetector nonlinearity in dual-comb interferometry
Philippe Guay, Alex Tourigny-Plante, Vincent Michaud-Belleau and, Nicolas Bourbeau H\'ebert, Ariane Gouin, J\'er\^ome Genest
TL;DR
This paper investigates how photodetector nonlinearity affects dual-comb spectrometry, highlighting optical aliasing effects and validating models with experimental data, to improve spectroscopic measurement accuracy.
Contribution
It provides a detailed comparison of nonlinearity effects in dual-comb and Fourier transform spectrometers, introducing a model that accounts for optical aliasing in dual-comb systems.
Findings
Photodetector nonlinearity causes spectral artifacts in dual-comb spectrometry.
Optical aliasing due to sampling affects nonlinear spectral artifacts.
Experimental validation confirms the model's accuracy.
Abstract
The impact of photodetector nonlinearity on dual-comb spectrometers is described and compared to that of Michelson-based Fourier transform spectrometers (FTS). The optical sampling occurring in the dual-comb approach, being the key difference with FTS, causes optical aliasing of the nonlinear spectral artifacts. Measured linear and nonlinear interferograms are presented to validate the model. Absorption lines of HCN are provided to understand the impact of nonlinearity on spectroscopic measurements.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAdvanced Fiber Laser Technologies · Photonic and Optical Devices · Mechanical and Optical Resonators