Amplification-free GW-level, 150 W, 14 MHz and 8 fs, thin-disk laser oscillator

• Semyon Goncharov, Kilian Fritsch, and Oleg Pronin
• received 03/21/2024; accepted 04/16/2024; posted 04/17/2024; Doc. ID 524513
• Abstract: We report an amplification-free thin-disk laser oscillatory system delivering 0.9 GW peak power. The 120 fs pulses at 14 MHz containing 12.8 μJ delivered by thin-disk oscillator were compressed by factor 15 down to 8.0 fs with 148 W average output power and overall 82% efficiency. Additionally, we showed that even a sub-two-cycle operation with 6.2 fs can be reached with this technology. The system will be a crucial part of XUV frequency comb being developed and unique high-repetition rate driver for attosecond pulse generation.