Abstract
Remote measurement of methane by absorption of laser light has been previously accomplished by, for example, integrated path detection using DF1 or Er:YAG2 systems and DIAL using an optical parametric oscillator.3 Geometrically range-resolved DIAL-Mie backscatter remote detection of methane in a simulated coal mine environment has also been demonstrated with an Er:YAG device.4 Theoretical and experimental work toward use of room temperature III–V compound semiconductor lasers as sources in a portable methanometer for use in coal mines is described in this paper. Accurate measurement of methane concentrations requires use of a wavelength free from absorption by other naturally occurring atmospheric and coal gas species while overlapping a methane absorption band.
© 1983 Optical Society of America
PDF ArticleMore Like This
R. K. DEFREEZ, R. A. ELLIOTT, W. D. EGAN, and R. T. BOOS
FI5 Conference on Lasers and Electro-Optics (CLEO:S&I) 1985
W. D. Egan, R. T. Boos, R. K. Defreez, and R. L. Byer
THK3 Conference on Lasers and Electro-Optics (CLEO:S&I) 1983
Richard K. DeFreez
ThB2 Optical Remote Sensing (HISE) 1985