Abstract

The design and certain basic characteristics of a new type of optoacoustic device (cell) are described. Initial experimental data using a CO2 laser operating in the 9–10-μm wavelength region demonstrated sufficient sensitivity to measure the absorption due to SF6 in the air at a concentration of one part in 1011. Acoustic Q's were demonstrated in excess of 1800. The general expression for the optoacoustic pressure variations inside the acoustical resonant cavity is given.

© 1978 Optical Society of America

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