Peer-reviewed papers
Pre-print manuscripts
High-purity amplification of circularly polarized orbital angular momentum modes in an active spun ring-core tapered fiber
Iuliia Zalesskaia, Hassan Asgharzadeh B., Zahra Eslami, Hossein Fathi, Evgenii Gribanov, Andrey Grishchenko, Florian Lindner, Katrin Wondraczek, Evgeny Savelyev, Marco Ornigotti, Valery Filippov, and Regina Gumenyuk
This work demonstrates an active spun ring-shaped tapered fiber as a gain medium for efficient amplification of OAM modes preserving their modal purity and polarization topology.
Read open access here.
Optical Vortex Dynamics in Non-Uniform Twisted Ring-Core Fibers
Hassan Asgharzadeh B., Regina Gumenyuk, Marco Ornigotti.
This theoretical study investigates how, by controlling the twisting and tapering parameters, it is possible to achieve efficient power transfer between different OAM modes in V4F's ring-core fibers.
Read open access here.
Interaction of Laguerre–Gaussian laser pulses with borane targets of different hydrogen–boron ratio
Lars Reichwein, Alexander Pukhov & Markus Büscher
The key findings are: 1) LG laser pulses can generate strong axial magnetic fields due to the Inverse Faraday effect, making them of interest for nuclear fusion, like in V4F. 2) Boranes allow some „tuning“ of the exact ratio of hydrogen to boron for different molecules, effectively changing the interaction of the laser pulse with the plasma.
Read open access here.
Coherent beam combining of optical vortices
Double-clad ytterbium-doped tapered fiber with circular birefringence as a gain medium for structured light
Iuliia Zalesskaia, Yuhao Lei, Peter G. Kazansky, Katrin Wondraczek, Regina Gumenyuk, and Valery Filippov
Read open access here.
High Yield of Alpha Particles Generated in Proton-Boron Nuclear Fusion Reactions Induced in Solid Boron Hydride B18H22
The V4F team has written a paper on the results of our first experimental campaign at the Prague Asterix Laser System (PALS) in 2023. While not yet peer-reviewed, the paper can already be accessed on arXiv here.
Power-Scalable Generation of High-Order Optical
Vortices Via Coherent Beam Combining
Hossein Fathi, Rafael F. Barros, and Regina Gumenyuk
This work demonstrates coherent beam combining as a versatile and scalable tool for the generation of high-power, high-purity optical vortex beams without imposing limitations on topological charge or spatial structure, while maintaining exceptionally high modal purity. While not yet peer-reviewed, the paper can already be accessed on arXiv here.
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