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Applications of two-photon absorption for detection of CO in combustion gases

Research paper by M. Aldén, S. Wallin, W. Wendt

Indexed on: 01 Apr '84Published on: 01 Apr '84Published in: Applied Physics B



Abstract

Laser-induced fluorescence has been used for detection of CO in different environments. The fluorescence light was obtained by using a two-photon transition between theX1∑− and theB1∑− electronical states around 230 nm. Cell measurements indicate a detection limit lower than 0.1 ppm. Measurements in a CH4/air flame and in a low pressure dc discharge were realized with a diode-array detector, which was used in an imaging mode, permitting single-shot CO distributions to be captured.