Opto-acoustic measurement of the local light absorption coefficient in turbid media: 2. On the possibility of light absorption coefficient measurement in a turbid medium from the amplitude of the opto-acoustic signal

Journal Article · Wed Sep 30 00:00:00 EDT 2009 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2009V039N09ABEH013984· OSTI ID:21471098

Pelivanov, Ivan M; Barskaya, M I; Podymova, N B; Khokhlova, Tanya D; Karabutov, Aleksander A ^[1]

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1. International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)

The second part of this work describes the experimental technique of measuring the local light absorption in turbid media. The technique is based on the measurement of the amplitude of an opto-acoustic (OA) signal excited in a turbid medium under the condition of one-sided access to the object under study. An OA transducer is developed to perform the proposed measurement procedure. Experiments are conducted for the turbid media with different optical properties (light absorption and reduced scattering coefficients) and for different diameters of the incident laser beam. It is found that the laser beam diameter can be chosen so that the dependences of the measured OA signal amplitude on the light absorption coefficient coincide upon varying the reduced scattering coefficient by more than twice. The obtained numerical and experimental results demonstrate that the OA method is applicable for measuring the local light absorption coefficient in turbid media, for example, in biological tissues. (measurement of parametrs of laser radiation)

• OSTI ID: 21471098
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 39, Issue 9; Other Information: DOI: 10.1070/QE2009v039n09ABEH013984; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION
ACOUSTIC MEASUREMENTS
AMPLITUDES
LASER RADIATION
LIGHT SCATTERING
MEASURING METHODS
OPTICAL PROPERTIES
PHOTON BEAMS
SIGNALS
TRANSDUCERS
VISIBLE RADIATION
BEAMS
ELECTROMAGNETIC RADIATION
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
SORPTION