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Title: Thermo-elastic wave model of the photothermal and photoacoustic signal

Abstract

By means of the thermo-elastic wave equation the dynamical propagation of mechanical stress and temperature can be described and applied to model the photothermal and photoacoustic signal. Analytical solutions exist only in particular cases. Using massively parallel computers it is possible to simulate the photothermal and photoacoustic signal in a most sufficient way. In this paper the method of local interaction simulation approach (LISA) is presented and selected examples of its application are given. The advantages of this method, which is particularly suitable for parallel processing, consist in reduced computation time and simple description of the photoacoustic signal in optical materials. The present contribution introduces the authors model, the formalism and some results in the 1 D case for homogeneous nonattenuative materials. The photoacoustic wave can be understood as a wave with locally limited displacement. This displacement corresponds to a temperature variation. Both variables are usually measured in photoacoustics and photothermal measurements. Therefore the temperature and displacement dependence on optical, elastic and thermal constants is analysed.

Authors:
;  [1];  [2]
  1. FG Physik Hochschule fuer Technik und Wirtschaft Mittweida (Germany)
  2. INFM, Torino (Italy)
Publication Date:
Research Org.:
International Society for Optical Engineering, Washington, DC (United States)
OSTI Identifier:
552026
Report Number(s):
CONF-9510106-Vol.2714
TRN: 97:005737-0002
Resource Type:
Conference
Resource Relation:
Conference: 27. annual symposium on optical materials for high power lasers, Boulder, CO (United States), 30 Oct - 1 Nov 1995; Other Information: PBD: [1996]; Related Information: Is Part Of Laser-induced damage in optical materials: 1995. Twenty-seventh annual Boulder damage symposium, proceedings; Bennett, H.E.; Guenther, A.H.; Kozlowski, M.R.; Newnam, B.E.; Soileau, M.J. [eds.]; PB: 794 p.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; LASER MATERIALS; HEATING; DEFORMATION; OPTICAL SYSTEMS; THERMOELASTICITY; PHOTOACOUSTIC EFFECT; PHOTOELASTICITY; LENSES; MIRRORS; LASER RADIATION; COMPUTERIZED SIMULATION; PARALLEL PROCESSING

Citation Formats

Meja, P, Steiger, B, and Delsanto, P P. Thermo-elastic wave model of the photothermal and photoacoustic signal. United States: N. p., 1996. Web.
Meja, P, Steiger, B, & Delsanto, P P. Thermo-elastic wave model of the photothermal and photoacoustic signal. United States.
Meja, P, Steiger, B, and Delsanto, P P. 1996. "Thermo-elastic wave model of the photothermal and photoacoustic signal". United States.
@article{osti_552026,
title = {Thermo-elastic wave model of the photothermal and photoacoustic signal},
author = {Meja, P and Steiger, B and Delsanto, P P},
abstractNote = {By means of the thermo-elastic wave equation the dynamical propagation of mechanical stress and temperature can be described and applied to model the photothermal and photoacoustic signal. Analytical solutions exist only in particular cases. Using massively parallel computers it is possible to simulate the photothermal and photoacoustic signal in a most sufficient way. In this paper the method of local interaction simulation approach (LISA) is presented and selected examples of its application are given. The advantages of this method, which is particularly suitable for parallel processing, consist in reduced computation time and simple description of the photoacoustic signal in optical materials. The present contribution introduces the authors model, the formalism and some results in the 1 D case for homogeneous nonattenuative materials. The photoacoustic wave can be understood as a wave with locally limited displacement. This displacement corresponds to a temperature variation. Both variables are usually measured in photoacoustics and photothermal measurements. Therefore the temperature and displacement dependence on optical, elastic and thermal constants is analysed.},
doi = {},
url = {https://www.osti.gov/biblio/552026}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1996},
month = {Tue Dec 31 00:00:00 EST 1996}
}

Conference:
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