Nonlinear femtosecond pulse compression at high average power levels by use of a large-mode-area holey fiber |
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Authors: | Südmeyer T Brunner F Innerhofer E Paschotta R Furusawa K Baggett J C Monro T M Richardson D J Keller U |
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Institution: | Ultrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH H?nggerberg HPT, 8093 Zürich, Switzerland. sudmeyer@phys.ethz.ch |
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Abstract: | We demonstrate that nonlinear fiber compression is possible at unprecedented average power levels by use of a large-mode-area holey (microstructured) fiber and a passively mode-locked thin disk Yb:YAG laser operating at 1030 nm. We broaden the optical spectrum of the 810-fs pump pulses by nonlinear propagation in the fiber and remove the resultant chirp with a dispersive prism pair to achieve 18 W of average power in 33-fs pulses with a peak power of 12 MW and a repetition rate of 34 MHz. The output beam is nearly diffraction limited and is linearly polarized. |
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