We propose and experimentally demonstrated a Tunable-Diode-Laser-Absorption-Spectroscopy (TDLAS) system using low-cost tunable DFB laser array. We implement Reconstruction-Equivalent-Chirp (REC) technology for a low-cost DFB laser array which is suitable for TDLAS system. Meanwhile, monolithic integration of multi-wavelength laser array is achieved, covering multiple absorption spectral lines. A gas sensing system for multi-peak detection is built. We chose methane as the interested gas in the experiment. The sensing data for absorption peaks of methane, including 1642.9nm, 1645.5nm, 1650.9nm and 1653.7nm are obtained. The methane concentration is measured as low as 500ppm.
A TDLAS gas sensor using tunable DFB laser array
2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications ; 2022 ; Online Only,China
Proc. SPIE ; 12279
2022-07-26
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
A Tunable Diode Laser Absorption Spectroscopy (TDLAS) Thermometry for Combustion Diagnostics
British Library Conference Proceedings | 2008
|SAE Technical Papers | 2009
|