Broadband high-energy diode-pumped Yb:KYW multipass amplifier |
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Authors: | Papadopoulos Dimitrios N Pellegrina Alain Ramirez Lourdes Patricia Georges Patrick Druon Frédéric |
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Affiliation: | Institut de la Lumière Extrême, CNRS, Ecole Polytechnique, ENSTA Paristech, Institut d’Optique, Palaiseau Cedex, France. dimitris.papadopoulos@institutoptique.fr |
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Abstract: | We report a diode-pumped Yb:KYW amplifier delivering up to 27 mJ pulses at a repetition rate of 100 Hz and a spectral bandwidth of 5.5 nm, centered at around 1030 nm. The system is based on a double-head multipass amplifier configuration where the pump thermal load is distributed over two relatively thin laser crystals, which permits a sufficiently large number of passes with minimal passive losses, thus maximizing the energy extraction efficiency. The amplified pulse bandwidth theoretically supports 340 fs pulses, and as a demonstration, a small fraction of the amplified pulses has been compressed to 560 fs. |
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