B4.4 Ultra-fast gas spectroscopy with a dual-comb spectrometer
- SMSI 2020
(did not take place because of Covid-19 virus pandemic)
- SMSI 2020 - Sensors and Instrumentation
- B4 Gas Sensors for Safety and Security
- L. Nitzsche, J. Kießling, S. Wolf, F. Kühnemann, J. Wöllenstein - Fraunhofer Institute for Physical Measurement Techniques IPM, Freiburg (Germany)
- 123 - 124
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 a rms of 4 % fit results indicate that absorptions features with (α*L) = 0.01 can be detected within measurement time of 0.5 ms.