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We demonstrate efficient generation of coherent super-octave pulses via asingle-stage spectral broadening of a Yb:KGW laser in a single, pressurized,Ne-filled, hollow-core fiber capillary. Emerging pulses spectrally spanningover more than $\sim$1 PHz (250 nm- 1600 nm) at a dynamic range of $\sim$60 dB,and an excellent beam quality open the door to combining Yb:KGW lasers withmodern light field synthesis techniques. Compression of a fraction of thegenerated supercontinuum to intense (8 fs, $\sim$2.4 cycle, $\sim$650 $\mu$J)pulses allows convenient use of these novel laser sources in strong-fieldphysics and attosecond science.

PHz scale spectral broadening and few-cycle compression of Yb:KGW laser pulses in a pressurized, gas-filled hollow-core fiber