Multi-terawatt femtosecond 10 μm laser pulses
by self-compression in a CO2 cell
Posted on 2020-10-26 - 21:15
We propose and numerically investigate a novel direct
route to produce multi-terawatt femtosecond selfcompressed 10 µm laser pulses suitable for the next
generation relativistic laser-plasma studies including
laser-wakefield acceleration at long wavelengths. The
basic concept involves selecting an appropriate isotope
of CO2 gas as a compression medium. This offers a
dispersion/absorption landscape that is shifted in
frequency relative to the driving CO2 laser used for 10 µm
picosecond pulse generation. We show numerically that
as a consequence of low losses and a broad anomalous
dispersion window, a 3.5 ps duration pulse can be
compressed to ~300 fs while carrying ~7 TW of peak
power in less than 7 m. An interplay of self-phase
modulation and anomalous dispersion leads to a ~3.5
times compression factor, followed by the onset of
filamentation near the cell exit to get below 300 fs
duration.
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Panagiotopoulos, Paris; Hastings, Michael; Kolesik, Miroslav; Tochitsky, Sergei; Moloney, Jerome (2020). Multi-terawatt femtosecond 10 μm laser pulses
by self-compression in a CO2 cell. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.5016506.v1
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AUTHORS (5)
PP
Paris Panagiotopoulos
MH
Michael Hastings
MK
Miroslav Kolesik
ST
Sergei Tochitsky
JM
Jerome Moloney