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Ultra-fast gas spectroscopy with a dual-comb spectrometer

: Nitzsche, Leonard; Kießling, Jens; Wolf, Sebastian; Kühnemann, Frank; Wöllenstein, Jürgen

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SMSI 2020 - Sensor and Measurement Science International : Proceedings, 22-25 June 2020, Nuremberg, Germany, SMSI 2020 is cancelled due to COVID-19
Wunstorf: AMA Service, 2020
ISBN: 978-3-9819376-2-6
ISBN: 978-3-9819376-3-3
ISBN: 3-9819376-3-5
Conference "Sensor and Measurement Science International" (SMSI) <2020, Nuremberg/cancelled>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IPM ()
Dual-Comb-Spectroscopy; gas analysis; Hydrogen Cyanide; absorption spectroscopy

Dual-comb spectroscopy has the potential to measure broadband transmission spectra fast and precisely. To employ these features for gas analysis we present a fiber-based dual-comb-spectrometer and compare the spectrum of an HCN filled cell with a simulation using the HITRAN database. Although point-to-point fluctuations across the spectrum show arms of 4 % fit results indicate that absorptions features with (α*L) = 0.01 can be detected within measurement time of 0.5 ms.