We have investigated atmospheric absorption near the frequency of the chemical oxygen iodine laser (COIL). Survey spectra were taken around the laser line both with a Fourier Transform Spectrometer (FTS) and with a tunable laser; we found the FTS to be better suited for this use. We have also measured absorption cross sections of several atmospheric gases at the COIL frequency. The photoacoustic detector used with COIL is preferred over the FTS.
S. L. Bragg,
S. A. Lawton,
C. E. Wiswall,
"Laboratory Measurements Of Laser Propagation", Proc. SPIE 0410, Laser Beam Propagation in the Atmosphere, (12 July 1983); doi: 10.1117/12.935750; https://doi.org/10.1117/12.935750