We propose and numerically investigate a novel direct route to produce multi-terawatt femtosecond self-compressed 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.
|Original language||English (US)|
|Number of pages||8|
|State||Published - Nov 15 2020|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
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Multi-terawatt femtosecond 10 μm laser pulses by self-compression in a CO2 cell
Panagiotopoulos, P. (Creator), Hastings, M. G. (Creator), Kolesik, M. (Creator), Tochitsky, S. (Creator) & Moloney, J. V. (Creator), The Optical Society, 2020
DOI: 10.6084/m9.figshare.c.5016506.v1, https://osapublishing.figshare.com/collections/Multi-terawatt_femtosecond_10_m_laser_pulses_by_self-compression_in_a_CO2_cell/5016506/1