1 April 1992 Collisionless excitation of NH3 molecules via one- and two-photon transitions by multimode radiation of TEA CO2 laser
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Proceedings Volume 1724, Tunable Diode Laser Applications; (1992) https://doi.org/10.1117/12.58679
Event: Tunable Diode Laser Applications, 1993, Moscow, Russian Federation
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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yu. A. Kuritsyn, G. N. Makarov, V. R. Mironenko, I. Pak, "Collisionless excitation of NH3 molecules via one- and two-photon transitions by multimode radiation of TEA CO2 laser", Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); doi: 10.1117/12.58679; https://doi.org/10.1117/12.58679
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