V. N. In'kov, E. B. Cherepetskaya, V. L. Shkuratnik, A. A. Karabutov, V. A. Makarov, “Thermal nonlinearity effect used in laser excitation of ultrasonic signals in geomaterials”, Prikl. Mekh. Tekh. Fiz., 2005, Volume 46, Issue 2,Pages <nobr>179

This article is cited in 1 paper

Thermal nonlinearity effect used in laser excitation of ultrasonic signals in geomaterials

V. N. In'kov^a, E. B. Cherepetskaya^a, V. L. Shkuratnik^a, A. A. Karabutov^b, V. A. Makarov^b

^a Moscow State Mining University, 119991, Moscow
^b International Laser Center, Lomonosov Moscow State University, 119992, Moscow

Abstract: The possibility of creating laser-ultrasonic sources of short power pulses of elastic longitudinal waves on the basis of nonlinear thermal processes in the generator medium is examined theoretically and experimentally. A three-dimensional model of thermal nonlinearity is considered, and the waveforms, spectra, and directional diagrams of signals excited in geomaterials are calculated.

Keywords: thermal nonlinearity, laser excitation, elastic waves, geomaterials.

UDC: 622.611.4:620.179.16

Received: 27.07.2004