Abstract

Radiation of a cw CO₂ laser can be used to excite infrared emission spectra of nearly all molecular gases by adding small amounts of SF₆ as a sensitizer. These emission spectra show a thermal equilibrium between vibrational, rotational, and translational states with temperatures up to 1200 K. Temperature profiles of these gases about a focused cw CO₂ laser beam are analyzed by Raman spectroscopy. The detection of small amounts of sample and investigations of cw laser-induced chemical reactions are interesting potential applications.

Far-infrared continuous-wave laser emission from H₂O and from NH₃ optically pumped by a CO laser

M. Schneider, K. M. Evenson, and J. W. C. Johns
Opt. Lett. 21(14) 1038-1039 (1996)

Quenching of Infrared Chemiluminescence. 1: The Rates of De-Excitation of CO (4 ≤ v ≤ 13) by He, CO, NO, N₂, O₂, OCS, N₂O, and CO₂

G. Hancock and I. W. M. Smith
Appl. Opt. 10(8) 1827-1842 (1971)

Photoacoustic spectroscopy on trace gases with continuously tunable CO₂ laser

Philippe Repond and Markus W. Sigrist
Appl. Opt. 35(21) 4065-4085 (1996)

Spectroscopic determination of rotational temperature in C₂H₄/C₂H₂/O₂ flames for diamond growth with and without tunable CO₂ laser excitation

X. N. He, X. K. Shen, T. Gebre, Z. Q. Xie, L. Jiang, and Y. F. Lu
Appl. Opt. 49(9) 1555-1562 (2010)

Continuous-wave Stark far-infrared lasing lines in ¹⁵NH₃ optically pumped by a CO₂ or N₂O laser

C. Gastaud, A. Sentz, M. Redon, and M. Fourrier
Opt. Lett. 6(9) 449-451 (1981)