Download or read book Development of Laser Absorption Sensors for Combustion Gases written by Xing Chao and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In situ sensors based on laser absorption spectroscopy are developed to monitor key species in combustion exhaust gases. Direct absorption (DA) and wavelength-modulation-spectroscopy (WMS) strategies are investigated for extended near-infrared and mid-infrared laser devices to detect target species in harsh environments at combustion exhaust temperatures in the presence of high moisture level and heavy particulate loading. A real time, in situ sensor for carbon monoxide (CO) was developed using DFB diode lasers near 2.3 æm, with selected transitions (R(10) near 4297.7 cm-1, R(11) near 4300.7 cm-1) in the first overtone band of CO. The sensor was studied in the controlled laboratory environments of a heated cell and a combustion exhaust rig. High temperature water vapor absorption spectra were first measured, and shown to produce