Generation of picoseconds stimulated Raman scattering in a BaWO4 crystal and frequency up-conversion by difference-frequency generation in BBO

MHz-rate picosecond laser discretely tunable from the near-infrared to the deep ultraviolet

“…The major difficulty is the peak power requirement, which makes it somewhat difficult to reach the threshold for stimulated Raman scattering without having a sufficient energy per pulse. As a result, most of the laser systems, based on stimulated Raman scattering frequency conversion, are relatively high-energy systems, operating at sub-mJ or higher energy level [7][8][9][10]. One possible solution is to utilize the intracavity stimulated Raman scattering, as it was done in the case of nanosecond lasers [11][12][13]; however, realizing stable operation of picosecond laser in this regime is rather challenging, and the repetition rate of such lasers is typically of the order of kHz, while for the optimal spectroscopic operation, higher repetition rate is desirable.…”