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)|
|Title of host publication||Conference on Lasers and Electro-Optics|
|Publisher||The Optical Society|
|State||Published - May 7 2018|