OPTIKA ATMOSFERY I OKEANA JOURNAL
V.E. ZUEV INSTITUTE OF ATMOSPHERIC OPTICS
Vol. 13, issue 11, article # 1
pdf Asiptsov O. I., Zakharov V. I., Gribanov K. G. Explosive absorption of СО2-laser radiation in the mixture of atmospheric air with carbon dioxide. // Atmospheric and oceanic optics. 2000. V. 13. No. 11. P. 905-908.Copy the reference to clipboard
Abstract:
Absorption of 35 W СО2 laser radiation is studied for the case of the laser beam focusing in an optical cell filled with a mixture of atmospheric air of room temperature and carbon dioxide of varying concentration (from 1 to 100%). The temperature of the gas mixture in a focal zone was controlled by the shift of interference fringes in a Mach-Zehnder interferometer based on a He-Ne laser. The interferometer was designed so that one its arm crossed the focus of the CO2-laser beam. At the carbon dioxide concentration higher than 20%, the mixture warms significantly (up to 600 K) in the focal zone, what can be explained by the effect of explosive absorption as the concentration of carbon dioxide achieves some critical value.