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Dispersion management of a 10 PW laser system
Vyhlídka, Štěpán ; Rus, Bedřich (advisor) ; Jelínková, Helena (referee) ; Kozák, Martin (referee)
This thesis deals with the design of a stretcher and compressor systems used for the chirped pulse amplification method for the L4 beamline. The L4 beamline is being developed for the ELI Beamlines project and aims to deliver pulses with peak power of 10 petawatt, central wavelength of 1060 nanometers, pulse duration of 150 femtoseconds and energy of 1500 Joules. Since the laser induced damage threshold and aperture of commercial diffraction gratings is currently a limiting factor in reaching higher peak powers, it was necessary to increase the effective aperture of the compressor using either tiled grating or object-image-grating self tiling methods. These two methods are compared for two compressor configurations using either 1740 ln/mm or 1136 ln/mm diffraction gratings, methods for their alignment are discussed and the selected alignment method is experimentally tested. Moreover, an analytical theory connecting the Seidel aberrations of the stretcher imaging system with the spectral phase deviation of the stretched pulse is presented. This theory is applied to commonly used Banks and Offner stretcher designs and it is demonstrated how it can be employed for the suppression of residual spectral phase of compressed pulses. Next, the design of the stretcher for the L4 beamline based on this theory is...
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Design of hybrid compressor for a 10PW laser
Kramer, Daniel ; Novák, Jakub ; Rus, Bedřich
The ELI beamlines facility wiil house a 10PW laser with ultrashort pulse duration. The laser damage threshold of the coating limits the minimum size of the last compression grating. Due to production restriction the last grating has to be tiled. The design was produced in order to minimize the total number of gratings in the compressor together with the spatial requirements.
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