Title :
Application of pulsed quantum cascade lasers to NO monitoring in industrial exhaust gases
Author :
Kosterev, Anatoliv A. ; Roller, Chad ; Tittel, Frank K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
Development of a pulsed quantum cascade laser (QCL) based spectroscopic gas sensor for detection of nitric oxide and other molecular species (NH3, H2O, and CO2) in industrial combustion exhaust systems are reported. A fast modulation approach similar to the method used with near-IR diode lasers´ to minimize the influence of fluctuating nonselective absorption was adapted to pulsed QCLs. A method of a few pulses long wavelength scans with absorption probing at precisely selected optical frequencies was implemented. A high-temperature gas cell was used for laboratory testing of the NO sensor performance.
Keywords :
exhaust systems; gas sensors; industrial pollution; quantum dot lasers; NO monitoring; absorption probing; fast modulation approach; high-temperature gas cell; industrial combustion exhaust systems; industrial exhaust gases; laboratory testing; molecular species; nitric oxide detection; nonselective absorption; pulsed quantum cascade lasers; spectroscopic gas sensor; Absorption; Combustion; Gas detectors; Gas industry; Gases; Monitoring; Optical pulses; Pulse modulation; Quantum cascade lasers; Spectroscopy;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1279023
