31 May 2001 Optical Doppler tomography of near-surface mass transfer processes induced by femtosecond laser
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Proceedings Volume 4242, Saratov Fall Meeting 2000: Coherent Optics of Ordered and Random Media; (2001); doi: 10.1117/12.427737
Event: Saratov Fall Meeting 2000, 2001, Saratov, Russian Federation
Abstract
A procedure of inspection of mass transfer processes by induced femtosecond laser has been suggested that is based on pump-probe Doppler tomography. In the experiments we used mode-locked Ti:sapphire laser with output power up to 150 mW. Pulse duration was 100fs at 100MHz repetition rate. In our experiments focused laser radiation induced on the surface of the target mass transfer processes (melting and convection). The Doppler shifted backscattered radiation was registered by heterodyne scheme based on Michelson interferometer. We have obtained information about depth and distribution of convection flows within melted paraffin bath with high spatial resolution ((delta) z~15micrometers ).
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Kirill P. Bestemyanov, Vyacheslav M. Gordienko, Alexei Konovalov, S. A. Magnitskii, J. S. Toursunov, "Optical Doppler tomography of near-surface mass transfer processes induced by femtosecond laser", Proc. SPIE 4242, Saratov Fall Meeting 2000: Coherent Optics of Ordered and Random Media, (31 May 2001); doi: 10.1117/12.427737; https://doi.org/10.1117/12.427737
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KEYWORDS
Doppler tomography

Femtosecond phenomena

Convection

Spatial resolution

Mode locking

Heterodyning

Interferometers

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