P46 - Compact Gas and Aerosol Sensing based on Photothermal Interferometry
- Event
- SMSI 2023
2023-05-08 - 2023-05-11
Nürnberg - Band
- Poster
- Chapter
- Poster
- Author(s)
- M. Tanzer, A. Bergmann, B. Lang - Technical University of Graz, Graz (Austria)
- Pages
- 368 - 369
- DOI
- 10.5162/SMSI2023/P46
- ISBN
- 978-3-9819376-8-8
- Price
- free
Abstract
An instrument for gas and aerosol sensing based on photothermal interferometry has been developed. Depending on the light source used for photothermal excitation, either gas or aerosol concentrations may be measured. A fabrication process for low-cost air-spaced Fabry-Pérot etalons, for the interferometric detection unit, is presented. Based on a demonstrator setup, an extensive scrutiny of all noise sources is being performed serving as a basis for the evaluation of the miniaturization potential of said sensor system. First measurements with water vapor were conducted, highlighting the sensor’s potential.