Spectral analysis of non-stationary speckle fluctuations: different data processing techniques

Pavel V. Zakharov; D. A. Zimnyakov

doi:10.1117/12.518494

23 September 2003 Spectral analysis of non-stationary speckle fluctuations: different data processing techniques

Pavel V. Zakharov, D. A. Zimnyakov

Proceedings Volume 5067, Saratov Fall Meeting 2002: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling III; Coherent Optics of Ordered and Random Media III; (2003) https://doi.org/10.1117/12.518494
Event: Saratov Fall Meeting 2002 Laser Physics and Photonics, Spectroscopy, and Molecular Modeling III; Coherent Optics of Ordered and Random Media III, 2002, Saratov, Russian Federation

Abstract

The methods of wavelet analysis and Hilbert transform are used to study the intensity fluctuations of a laser light scattered by interphase boundaries in the layer of a porous medium (paper) during evaporation of a volatile liquid with which the layer was impregnated. The analysis was performed using the Morlet wavelet as the base transformation function. The obtained spectra reflect characteristic features of the development of the evaporation front, which correspond to various stages of the process of nonstationary mass transfer in the porous layer-volatile liquid system studied.

Citation Download Citation

Pavel V. Zakharov and D. A. Zimnyakov "Spectral analysis of non-stationary speckle fluctuations: different data processing techniques", Proc. SPIE 5067, Saratov Fall Meeting 2002: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling III; Coherent Optics of Ordered and Random Media III, (23 September 2003); https://doi.org/10.1117/12.518494

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