Enhancement of filamentation postcompression by astigmatic focusing.
Opt Lett
; 36(19): 3867-9, 2011 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-21964124
ABSTRACT
The energy scaling up of pulse postcompression is still an open issue. In this work we analyze the use of astigmatic focusing to improve the output pulses in a filamentation based postcompression setup. Unlike spherical conditions, astigmatic focusing enhances the output energy and the spectral broadening of the filament. This is due to the increase of critical power, allowing a considerable improvement of the postcompression energy and stability in a simple way. We demonstrated compression from FWHM 100 fs, 10 nm, 3 mJ input pulses to 13 fs, 142 nm, near 1 mJ pulses.
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MEDLINE
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En
Ano de publicação:
2011
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Article