An optoacoustic detector or spectrophone has been used to perform detailed measurements of the absorptivity of mixtures of water vapor in air. A C12O216 laser was used as the source, and measurements were made. at forty-nine different wavelengths from 9.2 μm to 10.7 μm. The details of the optoacoustic detector and its calibration are presented, along with a discussion of its performance characteristics. The results of the measurements of water vapor absorption show that the continuum absorption in the wavelength range covered is 5–10% lower than previous measurements.
© 1976 Optical Society of America
Original Manuscript: March 13, 1976
Published: October 1, 1976
M. S. Shumate, R. T. Menzies, J. S. Margolis, and L.-G. Rosengren, "Water vapor absorption of carbon dioxide laser radiation," Appl. Opt. 15, 2480-2488 (1976)