Enhancement of filamentation postcompression by astigmatic focusing

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 broa...

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Bibliographic Details
Published in:Optics letters 2011-10, Vol.36 (19), p.3867-3869
Main Authors: ALONSO, Benjamin, BORREGO-VARILLAS, Rocio, SOLA, Iñigo J, VARELA, Oscar, VILLAMARIN, Ayalid, VICTORIA COLLADOS, M, SAN ROMAN, Julio, BUENO, Juan M, ROSO, Luis
Format: Article
Language:English
Subjects:
Beam trapping, self-focusing and defocusing
self-phase modulation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.003867