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Proceedings Paper

Ultrafast pump & probe investigations on the interaction of femtosecond laser pulses with glass
Author(s): Alexander Horn; Hooman Khajehnouri; Ernst-Wolfgang Kreutz; Reinhart Poprawe
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Paper Abstract

The change of the matrix structure of glass is investigated during and after irradiation with ultrashort pulsed laser radiation (100 fs < tp; < 3 ps) at the wavelength λ = 810 nm. The dynamics of the plasma expansion and the stress formations are visualized by time-resolved Normarski-photography. Optical microscopy visualizes the structural changes in glass. The spatial stress distribution and the refractive index change are shown in the time range 100 fs < t < 120 ns. The ionization state of atoms and/or the formation of color centers has been investigated by transient absorption spectroscopy (TAS) in the time regime 100 fs < t < 120 ns. The temporal change of the spectra shows different regimes, which can be explained by the electron and phonon relaxation.

Paper Details

Date Published: 1 August 2003
PDF: 8 pages
Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); doi: 10.1117/12.516935
Show Author Affiliations
Alexander Horn, Rheinisch-Westfaelische Technische Hochschule (Germany)
Hooman Khajehnouri, Rheinisch-Westfaelische Technische Hochschule (Germany)
Ernst-Wolfgang Kreutz, Rheinisch-Westfaelische Technische Hochschule (Germany)
Reinhart Poprawe, Rheinisch-Westfaelische Technische Hochschule (Germany)
Fraunhofer-Institut fuer Lasertechnik (Germany)


Published in SPIE Proceedings Vol. 4948:
25th International Congress on High-Speed Photography and Photonics
Claude Cavailler; Graham P. Haddleton; Manfred Hugenschmidt, Editor(s)

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