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Ultrafast pump and probe investigations on the interaction of femtosecond laser pulses with glass

 
: Horn, A.; Khajehnouri, H.; Kreutz, E.-W.; Poprawe, R.

:

Cavailler, C. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
25th International Congress on High-Speed Photography and Photonics 2002 : 29 September - 4 October 2002, Beaune, France
Bellingham, WA: SPIE, 2003 (SPIE Proceedings Series 4948)
ISBN: 0-8194-4744-7
ISBN: 978-0-8194-4744-9
ISSN: 0277-786X
S.393-400
International Congress on High Speed Photography and Photonics <25, 2002, Beaune>
Englisch
Konferenzbeitrag
Fraunhofer ILT ()

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 = 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.

: http://publica.fraunhofer.de/dokumente/N-171170.html