This article is cited in 43 papers

LASERS IN MEDICINE

Determination of the optical characteristics of turbid media by the laser optoacoustic method

A. A. Karabutov, I. M. Pelivanov, N. B. Podymova, S. E. Skipetrov

International Laser Center of Moscow State University

Abstract: A method, based on the optoacoustic effect for determination of the spatial distribution of the light intensity in turbid media and of the optical characteristics of such media was proposed (and implemented experimentally). A temporal profile of the pressure of a thermo-optically excited acoustic pulse was found to be governed by the absorption coefficient and by the spatial distribution of the light intensity in the investigated medium. The absorption coefficient and the reduced light-scattering coefficient of model turbid water-like media were measured by the optoacoustic method. The results of a direct determination of the spatial light-intensity distribution agreed with a theoretical calculation made in the diffusion approximation.

PACS: 42.79.Jq, 42.62.Eh

Received: 18.06.1999

 English version: Quantum Electronics, 1999, 29:12, 1054–1059

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