Abstract

It is desirable for the purge air of optics of an infrared spectrometer to be free of CO₂ as well as water so as not to lose energy in the CO₂ absorption region. This is presumed to be done by a commerical instrument company, using activated alumina to remove CO₂ as well as water. The use of a regenerative desiccant has the advantage over reagents such as soda lime since the alumina is reactivated cyclically to remove the CO₂ as well as water. It is the purpose of this paper to show which common desiccants are useful in this respect.

Removal of scratches on fused silica optics by using a CO₂ laser

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Opt. Express 21(23) 28272-28289 (2013)

Oxygen- and air-broadened linewidths of CO₂

Eric Arié, Nelly Lacome, Philippe Arcas, and Armand Levy
Appl. Opt. 25(15) 2584-2591 (1986)

Temperature-dependent diffuse reflectance spectroscopy of plasma-sprayed Cr-doped α-alumina using supercontinuum laser illumination and CO₂ laser heating

Michael C. Brupbacher, Dajie Zhang, William M. Buchta, Marc B. Airola, David M. Brown, Michael E. Thomas, and James B. Spicer
Appl. Opt. 56(27) 7618-7628 (2017)

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Robert F. Adamowicz and Kee P. Koo
Appl. Opt. 18(17) 2938-2946 (1979)

Air pollution monitoring with a Q-switched CO₂-laser lidar using heterodyne detection

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Appl. Opt. 20(14) 2534-2538 (1981)