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Updated: May 15, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Performance assessment and signal processing for range-integrated concentration measurement of gas species using
Alexandre Dobroc1, Nicolas Cézard
1ONERA, BP 80 100, Palaiseau 91 123, France. alexandre.dobroc@onera.fr
Abstract:
In this paper, we propose signal-processing tools adapted to supercontinuum absorption spectroscopy, in order to predict the precision of gas species concentration estimation. These tools are based on Cramer-Rao bounds computations. A baseline-insensitive concentration estimation algorithm is proposed. These calculations are validated by statistical tests on simulated supercontinuum signals as well as experimental data using a near-infrared supercontinuum laser and a grating spectrometer.
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