[17p-A501-1~12] 3.5 Ultrashort-pulse and high-intensity lasers (formerly 3.6)

[17p-A501-1] [The 53rd Young Scientist Presentation Award Speech] 1.7-cycle intense pulse generation for attosecond pulse source at megahertz repetition rates

〇Takuya Okamoto¹, Kohei Nagai¹, Yoji Kunihashi¹, Yasushi Shinohara¹, Haruki Sanada¹, Ming-Chang Chen², Katsuya Oguri¹ (1.NTT BRL, 2.NTHU)

Keywords:ultrafast optics, nonlinear optics, pulse compression

We generated 1.7-cycle and 35-μJ pulses at a 1-MHz repetition rate by using two-stage multi-plate continuum compression of Yb-laser pulses with 80-W average input power. This result is the shortest pulse duration in MHz-order intense pulse source. The beam focusing quality beyond 10¹⁴ W/cm² promises a MHz attosecond pulse source for advanced attosecond spectroscopic and imaging technologies with unprecedentedly high signal-to-noise ratios. In this talk, we will present recent efforts on high-harmonic generation for isolated attosecond pulse generation at a MHz operation.