Dr. Ádám Börzsönyi (group leader, senior research fellow, area manager)
Dr. Rodrigo Lopez-Martens (scientific advisor)
Dr. János Csontos (research fellow, deputy group leader, deputy area manager)
László Tóth (early-stage researcher)
Tamás Somoskői (early-stage researcher)
Laser system(s) concerned:
SYLOS laser (>4.5 TW peak power, 1 kHz repetition rate, <2.2 cycles pulse duration, 900 nm central wavelength, 250 mrad CEP stability, 1.5% energy stability)
Alignment laser (>40 mJ peak pulse energy, 10 Hz repetition rate, <50 fs pulse duration, 900 nm central wavelength, 2% energy stability)
One of our main R&D activities is the development of the SYLOS2 system. In this project, first we aim to improve the SYLOS1 output pulse duration - more than 3 cycles - of 10 fs to less than 2.2 cycles, that is, less than 6 fs. This activity requires new design for all major parts of the system downstream from the frontend in order to support the broader bandwidth. Then in the next step, we plan to increase the peak power from 4.5 TW to 20 TW with the application of additional pump lasers.
The genuine single cycle regime is planned to be reached by post-compression techniques. One of the most generally used methods is based on hollow-core fibers, but promising results also have been obtained by spectral broadening in thin glass plate sequences. Since these techniques are yet to be demonstrated with such high peak and average powers, we will gradually explore the possibilities for the safe and stable way to post-compress the SYLOS2 pulses.
The precise characterization of large aperture, ultrashort laser pulses not only challenged by the limited spectral response of generally used Si-based detectors, but spatiotemporal couplings can also introduce new levels of complexity. We plan to upgrade existing pulse diagnostic techniques and develop new ones in order to address the characterization issues associated with the SYLOS2 pulses.
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