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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 2: Light Sources and Diagnostics

K 2.4: Vortrag

Donnerstag, 2. September 2021, 14:45–15:00, H2

Near-field spectrally resolved phase diagnostics of intense ultrashort laser pulses — •Sergej Poplavski, Bastian Hagmeister, Sebastian Tesch, and Georg Pretzler — Heinrich-Heine-Universität, Düsseldorf

Ultrashort laser pulses can generate ultrahigh intensities by concentrating moderate amounts of energy into tiny temporal and spatial intervals. This is achieved by subtle dispersion management for the temporal domain and by high-quality focusing in the spatial domain. However, spatial and spectral phase imperfections of such a laser pulse may lead to spatio-temporal aberrations in the focus, which might significantly reduce the anticipated intensities and are difficult to detect directly.

We present a novel spectrally resolved wavefront diagnostic which is intrinsically quasi-self-referencing. This device can be employed for obtaining a complete description of the laser pulse's spatial and temporal distribution in the near field. No calibration procedure is needed for investigating the different spectral components of an ultrashort laser pulse.

We present the concept of the setup in this poster and demonstrate a proof-of-principle measurement with spectral resolution.