250 W average power, 100 kHz repetition rate cryogenic Yb:YAG amplifier for OPCPA pumping
- Zapata, Luis E.
- Reichert, Fabian
- Hemmer, M.
- Kärtner, F. X.
DOIAbstract
A cryogenically cooled, bulk Yb:YAG, four-pass amplifier delivering up to 250Waverage power at 100 kHz repetition rate is reported. The 2.5 mJ amplified optical pulses show a sub-20 ps duration before temporal compression and a spectrum supporting a transform-limited duration of 3.6 ps. The power instabilities were measured to be <0.5% rms over 30 min at full power, and the spatial intensity profile showed a flat-top distribution and near diffraction-limited beam quality. This compact amplifier is an ideal source for pumping either near-IR or mid-IR optical parametric chirped pulse amplifier
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