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Multi-pass-cell-based nonlinear pulse compression to 115 fs at 7.5 μJ pulse energy and 300 W average power

: Weitenberg, J.; Vernaleken, A.; Schulte, J.; Ozawa, A.; Sartorius, T.; Pervak, V.; Hoffmann, H.-D.; Udem, T.; Russbüldt, P.; Hänsch, T.W.

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Optics Express 25 (2017), No.17, pp.20502-20510
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer ILT ()

We demonstrate nonlinear pulse compression by multi-pass cell spectral broadening (MPCSB) from 860 fs to 115 fs with compressed pulse energy of 7.5 µJ, average power of 300 W and close to diffraction-limited beam quality. The transmission of the compression unit is >90%. The results show that this recently introduced compression scheme for peak powers above the threshold for catastrophic self-focusing can be scaled to smaller pulse energies and can achieve a larger compression factor than previously reported. Good homogeneity of the spectral broadening across the beam profile is verified, which distinguishes MPCSB among other bulk compression schemes.