Mittwoch, 06.07.2022, 16:00 Uhr
Seminarraum HI-Jena, Fröbelstieg 3
New Horizons for Ultrafast Pulse Compression
Nonlinear spectral broadening and pulse compression by dispersion compensation has emerged as a widely used method to shorten pulse durations and likewise enhance pulse peak powers of high average power ultrafast light sources. It has become an essential building block of DESY’s today’s and future user facility lasers. It is applied to improve temporal resolution of free electron laser (FEL) – optical laser pump-probe experiments and to pump nonlinear frequency converters. Beyond that, ultrafast pulse compression has potential to boost the repetition rates of laser-plasma-accelerators.
I will briefly review and compare power-scalable nonlinear spectral broadening methods and address the multi-pass cell as well as the hybrid multi-pass multi-plate approach in detail. The methods exhibit unique combinations of compression factors, power efficiency and robustness. I will, furthermore, present how the multi-pass cell technique is implemented in DESY’s FEL pump-probe lasers and report approaches to important future development directions of the technique, that are few-cycle pulse generation, pulse cleaning and peak power scaling. I will then focus on broadband or tunable mid-infrared generation schemes that are facilitated by ultrafast pulse compression and eventually exemplify science cases.