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Proceedings Paper

Active elastic scattering for remote laser vibration monitoring
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Paper Abstract

The paper is to introduce the principles of vector optical heterodyning and active elastic scattering for principally new remote laser vibration testing systems. This approach comes from a new adjoining coherent method of elastic light scattering, which was earlier experimentally provided for the specific small-size experiments of dynamics light scattering. The theory of vector optical heterodyning for remote laser testing is presented. The method is available within the technique for coherent signal processing by beating several scattered vector waves within a square-low photo-detector by their registration. While the classical passive methods of optical beating deals with the problem to study a scalar optical signal due to elastic scattering with a Doppler shift and a single narrow-band laser beam, the new method deals with two vector waves simultaneously undergo simultaneous scattering by a remote vibrating object. In the case of one the vector waves (heterodyne) has strong periodical modulation of direction of polarization, Coherent Light Beating Scattering (CLBS) occurs, which unites elastic Light Scattering and Coherent non-linear Beating (mixing) within the square-low photo-detector. As a result, the vector optical signal provides the information about both vibrating spectrum and surface profile of a remote scattering object, which is not available for well-known Doppler methods with scalar optical heterodyning.

Paper Details

Date Published: 22 May 2002
PDF: 8 pages
Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); doi: 10.1117/12.468194
Show Author Affiliations
Anatoly T. Sukhodolsky, General Physics Institute (Russia)


Published in SPIE Proceedings Vol. 4827:
Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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