Brief Communications

Investigation of nonlinear absorption in H₂O vapors subjected to strong optical fields with linear and circular polarizations

V. P. Lopasov, Yu. N. Ponomarev, B. A. Tikhomirov


Abstract: The optoacoustic method was used to investigate the change in the collisional profile of the 694.38 nm absorption line of H₂O subjected to strong fields of laser radiations with linear and circular polarizations. The measurements were carried out with a resolution of 0.015 cm^–1 using laser radiations of intensities up to 50 MW/cm². The study of nonlinear absorption was made for H₂O–air, H₂O–N₂, H₂O–Ar, and H₂O–Xe mixtures at total pressures in excess of 180 Torr using radiations of several intensities.

UDC: 535.341

PACS: 33.20.Kf, 33.70.Jg, 33.80.-b, 43.35.Sx

Received: 05.11.1981

 English version: Soviet Journal of Quantum Electronics, 1982, 12:8, 1110–1112

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