SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 7: Poster I

Q 7.18: Poster

Montag, 6. März 2023, 16:30–19:00, Empore Lichthof

Coherent beam recombination of intense femtosecond beams/pulses after controllable beam break-up and spectral broadening by using optical vortex lattices — •Lyubomir Stoyanov^1,2, Alexander Dreischuh², and Gerhard Paulus^1,3 — ¹Institute of Optics and Quantum Electronics, Friedrich Schiller University, Max-Wien-Platz 1, 07743 Jena, Germany — ²Department of Quantum Electronics, Faculty of Physics, Sofia University, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria — ³Helmholtz Institute Jena, Helmholtzweg 4, 07743 Jena, Germany

Ultra-short laser pulse generation, as well as extreme nonlinear processes like high-harmonic generation, are extensively studied and still actively developing fields of modern photonics. Ever since their discovery, researchers are dealing with problems like spectral broadening, filamentation, pulse/beam diagnostics, pulse amplification, and coherent beam recombination. On the other hand, singular optics is another rapidly developing field in which subject of interest is the sculpting of a laser beam by nesting phase singularities in it.

At high beam/pulse intensities, the beams are prone to instabilities, which could be suppressed by controllable splitting of the beam into sub-beams. This makes sense only if there is a reliable way to coherently recombine the sub-beams after their spectral broadening for pulse compression prior entering the laser-matter interaction zone. Some novel approaches towards these unsolved problems in nonlinear optics, based on previous studies on laser beams carrying phase singularities, will be presented and discussed.