M1-1.3 - Tuned Sideband Diode Laser Absorption Spectroscopy

Event

23. ITG/GMA-Fachtagung Sensoren und Messsysteme 2026
2026-06-09 - 2026-06-10
Nürnberg

Band

Vorträge

Chapter

Optische und IR-Sensoren 1

Author(s)

K. Wu, S. Palzer - Technische Universität Dortmund, Dortmund

Pages

324 - 325

DOI

10.5162/sensoren2026/M1-1.3

ISBN

978-3-910600-11-9

Price

free

Abstract

Tunable Diode Laser Absorption Spectroscopy allows for real-time, non-intrusive gas detection and concentration measurements. In conventional implementations it relies on determining the laser frequency during tuning, which hampers precise reconstruction of the absorption line due to non-linear effects. In this work, a method utilizing precisely controlled, frequency varying first order sidebands to probe an absorption line is demonstrated. A calibration procedure for determining the frequency modulation depth is introduced and implemented experimentally. The results demonstrate good agreement between simulation and measurement, highlighting the potential of sideband-sweeping for implementing accurate laser absorption spectroscopy.