Abstract

A chirped-pulse regenerative amplifier based on a $\mathrm{Yb}\text{:}{\mathrm{YVO}}_4$ (Yb:YVO) crystal was demonstrated for the first time, to our knowledge. A novel wavelength-independent off-axis technique was used to deliver 26.6 W of pump power with a low quantum defect. It was seeded by means of a 120 fs $\mathrm{Yb}\text{:}{\mathrm{YVO}}_4$ oscillator. It generates as much as 5.5 W of average output power with chirped pulses and 4.2 W with 200 fs compressed pulses at a 200 kHz repetition rate. A maximum pulse energy of 140 μJ was obtained at pulse repetition frequencies up to 25 kHz at the central wavelength of 1018 nm.

© 2015 Optical Society of America

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