Photo-acoustic measurements of UV laser pulses (266 nm) absorption in mixtures of water vapor with nitrogen
A.N. Kuryak, M.M. Makogon, Yu.N. Ponomarev, B.A. Tikhomirov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: H2O absorption, UV range, laser, photo-acoustic method
Abstract
The results of photo-acoustic measurements of the laser pulses with a wavelength of 266 nm by water vapor mixed with nitrogen on laser radiation intensity are presented. The laser radiation intensity varies from 0.5 till 10 mW/cm2 and water vapor partial pressure changes with 0–10 mbar. It is shown that with laser intensity increase the absorption is linear for H2O partial pressure increase from 0 to 5 mbar and becomes ruther stable at H2O partial pressure increase from 5 till 10 mbar.
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