SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 7: Poster I
Q 7.4: Poster
Montag, 6. März 2023, 16:30–19:00, Empore Lichthof
Compression of Laser Pulses by Nonlinear Multipass Cells — •Peer Biesterfeld1, David Zuber1,2, Jose Mapa1, and Uwe Morgner1,2,3 — 1Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — 2Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines) 30167 Hannover, Germany — 3Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany
Due to the high efficiency, good scalability to high pulse energies and compactness multipass cells (MPCs) for post compression of laser pulses, are currently of high interest. In particular, gas-filled MPCs enable the compression of pulses with high pulse energies and simultaneously high average powers with efficiencies higher than 90%.
The compression of picosecond pulses to the few cycle regime is beyond the limits of a single MPC. To find the best way simulations based on the unidirectional pulse propagation equation (UPPE) in cylindrical coordinates are performed, leading to a two stage setup. In the first cell, a high compression ratio is achieved in order to exploit the high reflectivity of broadband dielectric mirrors. The high compression factor is achieved by using molecular gases as a nonlinear medium at comparatively low gas pressure and low cost. Gires-Tournois Interferometers (GTIs) are being used to compress the pulse before the second cell, which is operated in an atomic noble gas using silver mirrors.
To verify the functionality of the cell, the spectral, temporal and spatial characteristics of the output are measured and compared with the simulation results.