Water-vapor absorption database using dual comb spectroscopy from 300 to 1300 K part I: Pure H2O, 6600 to 7650 cm-1

SC Egbert, K Sung, SC Coburn, BJ Drouin… - Journal of Quantitative …, 2024 - Elsevier
We present broadband dual frequency comb laser measurements of pure H 2 O absorption
(natural isotopic abundance of 99.7% H 2 16 O) from 6600 to 7650 cm− 1 (1307–1515 nm) …

Linear dual-comb interferometry at high power levels

P Guay, M Walsh, A Tourigny-Plante, J Genest - Optics Express, 2023 - opg.optica.org
Detector non-linearity is an important factor limiting the maximal power and hence the signal-
to-noise ratio (SNR) in dual-comb interferometry. To increase the SNR without …

Validation of open-path dual-comb spectroscopy against an O2 background

NA Malarich, BR Washburn, KC Cossel, GJ Mead… - Optics …, 2023 - opg.optica.org
Dual-comb spectroscopy measures greenhouse gas concentrations over kilometers of open
air with high precision. However, the accuracy of these outdoor spectra is challenging to …

High-temperature absorption line shape parameters for CO2 in the 6800–7000 cm-1 region from dual frequency comb measurements up to 1000 K

RK Cole, N Hoghooghi, BJ Drouin, GB Rieker - Journal of Quantitative …, 2021 - Elsevier
We present the first systematic study of self-broadened CO 2 line shape parameters in the
00031← 00001 and 01131← 01101 bands at high temperature. We report temperature …

Graphics card-based real-time processing for dual comb interferometry

M Walsh, J Kasic, K Cossel, J Genest - Review of Scientific Instruments, 2024 - pubs.aip.org
The technique of performing interferometry with two optical frequency combs is used by an
increasing number of research groups and even for field deployed commercial applications …

Addressing asymmetric Fano profiles on molecular lines in dual-comb spectroscopy

P Guay, M Walsh, J Genest - Optics Letters, 2022 - opg.optica.org
Fano resonance in molecular spectroscopy is reported with a dual-comb instrument. The
effect is observed as asymmetric absorption lines of H^ 12CN. Pulse chirping conditions in …

Open-path measurement of stable water isotopologues using mid-infrared dual-comb spectroscopy

DI Herman, G Mead, FR Giorgetta… - Atmospheric …, 2023 - amt.copernicus.org
We present an open-path mid-infrared dual-comb spectroscopy (DCS) system capable of
precise measurement of the stable water isotopologues H 2 16 O and HD 16 O. This system …

Water-Vapor Absorption Database Using Dual Comb Spectroscopy From 300-1300 K Part Ii: Air-Broadened H2o, 6600 to 7650 Cm-1

SC Egbert, K Sung, SC Coburn, BJ Drouin… - Available at SSRN …, 2024 - papers.ssrn.com
We present broadband dual frequency comb laser absorption measurements of 2% H2O
(natural isotopic abundance of 99.7% H216O) in air from 6600-7650 cm-1 (1307-1515 nm) …

Correcting photodetector nonlinearity in dual-comb interferometry

P Guay, NB Hébert, A Tourigny-Plante… - Optics …, 2021 - opg.optica.org
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 …

Removing biases in dual frequency comb spectroscopy due to digitizer nonlinearity

NA Malarich, KC Cossel, JD Deschenes… - Optics …, 2023 - opg.optica.org
Operation of any dual-comb spectrometer requires digitization of the interference signal
before further processing. Nonlinearities in the analog-to-digital conversion can alter the …