Energy-scalable temporal cleaning device for femtosecond laser pulses based on cross-polarized wave generation

Abstract : We report on a compact energy-scalable device for generating high-fidelity femtosecond laser pulses based on spatial filtering through a hollow-core fiber followed by a nonlinear crystal for crosspolarized wave (XPW) generation. This versatile device is suited for temporal pulse cleaning over a wide range of input energies (from 0.1 to >10 mJ) and is successfully qualified on different ultrafast laser systems. Full characterization of the XPW output is presented. In particular, we demonstrate the generation of 1.6 mJ energy pulses starting from 11 mJ input pulse energy. The temporal contrast of the pulses is enhanced by more than 4 orders of magnitude. In addition, pulse shortening from 40 fs down to 15 fs Fourier-transform limit yields an overall peak-power transmission of up to 50%. This device not only serves as an integrated pulse contrast filter inside an ultrafast laser amplifier but also as a simple back-end solution for temporal post-compression of amplified pulses.
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Aurélien Ricci, Aurélie Jullien, Jean-Philippe Rousseau, Yi Liu, Aurélien Houard, et al.. Energy-scalable temporal cleaning device for femtosecond laser pulses based on cross-polarized wave generation. Review of Scientific Instruments, American Institute of Physics, 2013, 84 (4), pp.043106. ⟨10.1063/1.4801457⟩. ⟨hal-01303688⟩

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