Ultrafast lasers reaching extremely high powers within short fractions of time enable a
plethora of applications. They grant advanced material processing capabilities, are effective …

The fundamental principles and experimental implementations of multipass cells used as a
platform for nonlinear optics are reviewed. Embedding a nonlinear medium in a multipass …

We demonstrate the reliable generation of 1-mJ, 31-fs pulses with an average power of 1 kW
by post-compression of 200-fs pulses from a coherently combined Yb: fiber laser system in …

The pulse duration at the output of femtosecond lasers is usually close to the Fourier limit,
and can be shortened by increasing the spectral width. To this end, use is made of self …

Multi-pass cell (MPC) compressors have proven to be the method of choice for compression
of high average power long-pulse Yb lasers. Yet, generating sub-30 fs pulses at high pulse …

The output of a 200 kHz, 34 W, 300 fs ytterbium amplifier is compressed to 31 fs with> 88%
efficiency to reach a peak power of 2.5 GW, which to date is a record for a single-stage bulk …

The investigation of spatio-temporal couplings (STCs) of broadband light beams is
becoming a key topic for the optimization as well as applications of ultrashort laser systems …

The characterization of ultrashort laser pulses has significantly advanced beyond the
standard spatial and temporal diagnostics to now include sophisticated spatio-temporal …

Abstract The Free‐Electron Laser (FEL) FLASH offers the worldwide still unique capability to
study ultrafast processes with high‐flux, high‐repetition rate extreme ultraviolet, and soft X …

We study both numerically and experimentally the use of two third-order nonlinear temporal
filtering techniques, namely nonlinear ellipse rotation and cross-polarized wave generation …