Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 45: Photonics III
Q 45.4: Talk
Thursday, March 9, 2023, 11:45–12:00, A320
Photoacoustic spectroscopy with a tunable narrowband infrared laser system — •Luca Schmid, Florent Kadriu, Sandro Kuppel, Tobias Steinle, and Harald Giessen — 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Germany
We report on a photoacoustic setup with a narrowband picosecond ultrafast tunable laser system in the mid-infrared. The fingerprints of various atmospheric species such as humid ambient air and carbon dioxide overtones at 5000 cm−1 at 2000 ppm have been detected. The entire molecular overtone is scanned within a few seconds with a linewidth-limited resolution of 2 cm−1. We quantify the signal-to-noise ratio and compare these data with theoretically calculated spectra from the HITRAN database. Even extremely weak resonances can be resolved owing to the excellent brilliance of the laser source with several hundreds of mW output power.