“…The output characteristics are MW range pulse power, pulse durations in the order of picoseconds (10-1,000 optical cycles), up to few GHz of micro pulse repetition rates, and the continuous and fast tuning over a wide range of wavelengths combined with coherent radiation properties. Infrared and THz radiation is of great interest for various applications and for studying fundamental mechanisms [62][63][64][65][66]. Just to name, some examples are: strongly correlating quantum systems, magnetic states in solids, complex fluids, bio-fluids, nanoscopic structures, membrane proteins, bio-molecules, functioning dynamics in biosystems, materials chemistry, electronic transitions in semiconductors, including interband dynamics, phonon scattering and inter-sub band dynamics in quantum wells, inter-sublevel spectroscopy and polaron dynamics in quantum dots, polaron dynamics, coherent dynamics, spin dynamics, impurities in semiconductors, vibrations in crystalline solids and amorphous materials covering the local modes in insulators, vibrational modes of hydrogen-like atoms and molecules.…”