Abstract

Spectral broadening and compression of ultrashort pulses in Herriott-type multipass cells have become a widely used technique to generate few-cycle electric fields, which are beneficial for a wide range of applications. However, only a few demonstrations approached the sub 15 fs pulse duration as it increasingly challenging to support the necessary bandwidth and manage the corresponding mirror dispersion. Such cells are very robust with regard to misalignment-triggered damage and are suitable for high-power operation, maintaining average power scalability [1–3] and compact portable form factor. Such merits make multipass cells highly suitable for developing high-repetition rate extreme ultraviolet sources via high harmonic generation (HHG) in noble gases for APRES or XUV-frequency comb spectroscopy.

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