High-average power THz generation in the tilted pulse front geometry in Lithium Niobate

We demonstrate a table-top source of single-cycle THz pulses with, to the best of our knowledge, a record-high average power of 66 mW at Megahertz (MHz) repetition rates. The setup operates at high-repetition rate of 13.3 MHz and is driven by a state-of-the-art modelocked thin-disk oscillator generating >100 W of average power. We present scaling trends in this excitation regime and show first cryogenic cooling results in this high-average power excitation regime showing that significantly higher powers can be expected in the near future.