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Suppression of detrimental modal interference effects within a cladding-pumped multimode thulium fiber amplifier is achieved using variable bandwidth seed source. The amplifier produced pulse energies of 1.1mJ and peak powers over 20kW at 1956nm.
The interaction of a laser filament with micro-sized water droplets was studied to further understand the energy dissipation of filaments in aerosol media. The analysis of the shockwave formation allows the quantification of the energy balance during the interaction and discuss the survival of filaments in perturbed propagation media.
Using a commercial, diode-side pumped Nd:YAG rod laser module, we obtain more than 53% extraction efficiency in fundamental mode with respect to multimode operation in a fully polarized beam.
Laser-wakefield-accelerated electrons were used to drive an all-optical undulator source, a 5-keV betatron X-ray source and a tunable quasi-monochromatic Compton-X-ray source. Also, we present a phase-contrast tomogram of a fly obtained with the betatron beam.
We developed a method to stabilize the carrier-envelope phase of a 20 TW Ti:Sapphire laser operating at 10 Hz. Phase-dependent features were observed in the high-order harmonic spectrum generated using Generalized Double Optical Gating.
X-ray radiation emitted by electrons during their acceleration in a laser-plasma accelerator was used to evidence two distincts self-injection mechanisms (longitudinal and transverse) and to identify one source of angular-momentum growth in laser-plasma accelerators.
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