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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.16: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Sensitive measurements of atmospheric absorption spectra in the cavity of a broadband Cr:forsterite laser — •Svetlana Kuznetsova, Peter Fjodorow, Klaus Sengstock, and Valeri Baev — Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
Chromium doped forsterite lasers are of high interest for molecular spectroscopy due to their broad emission, ranging from 1.1 to 1.4 µm [1]. We demonstrate a broadband Cr:forsterite laser around 1.26 µm, pumped by an Yb-doped fiber laser with variable pulse duration. We performed intracavity absorption measurements with this laser and achieved an effective absorption path length of about 1000 km. The laser system can be applied for simultaneous sensitive measurements of various atmospheric molecules, e.g., O2, H2O, CO2, CH4, N2O and HO2. Some pollutants, such as HF and HCl can be measured with a sub ppb sensitivity as well.
This project is supported by DFG within GRK1355.
[1]. I. McKinnie et al, Appl Opt. 36, 4985 (1997)