Wolf, SebastianSebastianWolfLindner, ChiaraChiaraLindnerTrendle, TobiasTobiasTrendleKießling, JensJensKießlingWöllenstein, JürgenJürgenWöllensteinKühnemann, FrankFrankKühnemann2023-09-282023-09-282023https://publica.fraunhofer.de/handle/publica/45111510.1109/CLEO/Europe-EQEC57999.2023.10231906Breath analysis has long been a particular target of interest in the development of laser spectroscopic methods. The possibility of non-invasive sampling of biomarkers and physiological parameters for diagnostics is an attractive goal, and its sensitivity, specificity and fast response make laser spectroscopy a suitable technique to this end. This holds especially for the detection of light-molecule components with high physiological significance such as nitrous oxide (N20)[I] or ammonia (NH3)[2]. Thanks to their particular high sensitivity without the need for bulky long-path cells, photothermal methods are a frequent choice for breath gas analysis [3]–[5].enPhotothermal spectroscopyBreath gas analysisPhotothermal common-path interferometryPCITrace gas sensingAmmoniaNitrous oxideBiomarkersSensitivityPatient monitoringconference paper