Abstract
A laser absorption sensor for carbon monoxide concentration was developed for combustion studies in a rapid compression machine using a pulsed quantum cascade laser near 4.89 μm. Cavity enhancement reduced minimum detection limit down to 2.4 ppm at combustion relevant conditions. Off-axis alignment and rapid intra-pulse down-chirp resulted in effective suppression of cavity noise.
Original language | English (US) |
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Title of host publication | Conference on Lasers and Electro-Optics |
Publisher | The Optical Society |
ISBN (Print) | 9781943580422 |
DOIs | |
State | Published - May 7 2018 |