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Proceedings Paper

Collisionless excitation of NH3 molecules via one- and two-photon transitions by multimode radiation of TEA CO2 laser
Author(s): Yu. A. Kuritsyn; G. N. Makarov; V. R. Mironenko; I. Pak
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Paper Abstract

The excitation of ammonia via one- and two-photon transitions by TEA CO2-laser radiation has been studied under collisionless conditions. It has been shown that the experimental results of two-photon excitation of 14NH3 molecule in the 2 (nu) 2 a(1, 1) $IMP a(1, 1) transition by the 10P(24) CO2-laser line, the frequency offset of which is approximately equals 0.02 cm-1, can be described well by modeling the laser radiation as a broadband chaotic field. The experimental results of one-photon excitation in 14NH3 and 15NH3,4 with the offset values exceeding the CO2- laser linewidth, can be also described well with the use of a chaotic field with a continuous spectrum. In the case of a nearly exact one-photon resonance, however, the excitation efficiency of molecules depends critically on the real mode structure of the CO2-laser radiation.

Paper Details

Date Published: 1 April 1992
PDF: 11 pages
Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); doi: 10.1117/12.58679
Show Author Affiliations
Yu. A. Kuritsyn, Institute of Spectroscopy (Russia)
G. N. Makarov, Institute of Spectroscopy (Russia)
V. R. Mironenko, Institute of Spectroscopy (Russia)
I. Pak, Institute of Spectroscopy (Russia)


Published in SPIE Proceedings Vol. 1724:
Tunable Diode Laser Applications

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