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This article is cited in 6 scientific papers (total in 6 papers)
Measurement of parametrs of laser radiation
Opto-acoustic measurement of the local light absorption coefficient in turbid media: 1. Monte-Carlo simulation of laser fluence distribution at the beam axis beneath the surface of a turbid medium
I. M. Pelivanov, M. D. Barskaya, N. B. Podymova, T. D. Khokhlova, A. A. Karabutov International Laser Center of Moscow State University
Abstract:
A new method for measuring the local light absorption coefficient in turbid media, for example, biological tissues, is proposed. The method is based on the fact that the amplitude of the excited opto-acoustic (OA) signal is proportional to the absorbed laser power density (the product of the light absorption coefficient and the laser fluence) at the medium interface. In the first part of the paper, the influence of the laser beam diameter, the light absorption and reduced scattering coefficients on the maximal amplitude of the laser fluence at the laser beam axis in the near-surface layer of the turbid medium is studied by using the Monte-Carlo simulation. The conditions are predicted under which the amplitude of the OA signal detected in a transparent medium in contact with the scattering medium should remain proportional to the light absorption coefficient of the medium under study, when the scattering coefficient in it changes more than twice. The results of the numerical simulation are used for the theoretical substantiation of the OA method being proposed.
Received: 01.10.2008 Revised: 08.12.2008
Citation:
I. M. Pelivanov, M. D. Barskaya, N. B. Podymova, T. D. Khokhlova, A. A. Karabutov, “Opto-acoustic measurement of the local light absorption coefficient in turbid media: 1. Monte-Carlo simulation of laser fluence distribution at the beam axis beneath the surface of a turbid medium”, Kvantovaya Elektronika, 39:9 (2009), 830–834 [Quantum Electron., 39:9 (2009), 830–834]
Linking options:
https://www.mathnet.ru/eng/qe13983 https://www.mathnet.ru/eng/qe/v39/i9/p830
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