https://doi.org/10.1051/epjconf/202226608014
Supercontinuum generation in the enhanced frequency chirp regime in multipass cells
1 Grupo de Investigación en Aplicaciones del Láser y Fotónica, Departamento de Física Aplicada, Universidad de Salamanca, E-37008, Salamanca, Spain
2 Department of Physics, JILA and STROBE NSF Science & Technology Center, University of Colorado and NIST, Boulder, Colorado, United States
* Corresponding author: vwsstaels@usal.es
Published online: 13 October 2022
We identify, via numerical simulations, the regime of enhanced frequency chirp during nonlinear propagation in multipass cell. This regime - used before the dawn of chirped pulse amplification to generate ultrashort pulses - paves the way for the generation of temporally clean few-cycle pulses. Here, we demonstrate numerically that the spectra of pulses from an Yb-based laser system can be broadened into a flat supercontinuum with a smooth spectral phase compatible with a clean few-cycle pulse with temporal secondary structures with peak intensity below 0.5% that of the main peak.
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