Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation
Focused femtosecond beam filamentation after amplitude masks has been studied experimentally and numerically. We deduced conditions (energy per hole, diameter and geometrical composition of holes, focal length) providing for the formation of the regularized bundle of filaments or single on-axis fila...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/8/928 |
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| author | Ekaterina Mitina Daria Uryupina Daniil Shipilo Irina Nikolaeva Nikolay Panov Roman Volkov Olga Kosareva Andrei Savel’ev |
| author_facet | Ekaterina Mitina Daria Uryupina Daniil Shipilo Irina Nikolaeva Nikolay Panov Roman Volkov Olga Kosareva Andrei Savel’ev |
| author_sort | Ekaterina Mitina |
| collection | DOAJ |
| description | Focused femtosecond beam filamentation after amplitude masks has been studied experimentally and numerically. We deduced conditions (energy per hole, diameter and geometrical composition of holes, focal length) providing for the formation of the regularized bundle of filaments or single on-axis filament at the given pulse duration and beam diameter. We showed that a light channel with small diameter (∼200 μm) and overcritical peak power may be formed well before both the focal distance and the Marburger length, and this channel collapses due to self-focusing and forms the filament. The start position of such a filament can be predicted based on the linear propagation equation, while a more sophisticated non-linear approach that takes into account the Kerr nonlinearity, plasma effects, etc., helps to describe the temporal structure of a filament, its frequency, and its angular spectrum. |
| first_indexed | 2024-03-10T23:38:48Z |
| format | Article |
| id | doaj.art-a4ba3ac22ee14889b8f2743cb92fd63e |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T23:38:48Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-a4ba3ac22ee14889b8f2743cb92fd63e2023-11-19T02:39:56ZengMDPI AGPhotonics2304-67322023-08-0110892810.3390/photonics10080928Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser FilamentationEkaterina Mitina0Daria Uryupina1Daniil Shipilo2Irina Nikolaeva3Nikolay Panov4Roman Volkov5Olga Kosareva6Andrei Savel’ev7Faculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFaculty of Physics, Lomonosov Moscow State University, GSP-1, 1-2 Leninskiye Gory, 119991 Moscow, RussiaFocused femtosecond beam filamentation after amplitude masks has been studied experimentally and numerically. We deduced conditions (energy per hole, diameter and geometrical composition of holes, focal length) providing for the formation of the regularized bundle of filaments or single on-axis filament at the given pulse duration and beam diameter. We showed that a light channel with small diameter (∼200 μm) and overcritical peak power may be formed well before both the focal distance and the Marburger length, and this channel collapses due to self-focusing and forms the filament. The start position of such a filament can be predicted based on the linear propagation equation, while a more sophisticated non-linear approach that takes into account the Kerr nonlinearity, plasma effects, etc., helps to describe the temporal structure of a filament, its frequency, and its angular spectrum.https://www.mdpi.com/2304-6732/10/8/928femtosecond filamentationregularized array of filamentsdiffractionKerr effect |
| spellingShingle | Ekaterina Mitina Daria Uryupina Daniil Shipilo Irina Nikolaeva Nikolay Panov Roman Volkov Olga Kosareva Andrei Savel’ev Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation Photonics femtosecond filamentation regularized array of filaments diffraction Kerr effect |
| title | Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation |
| title_full | Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation |
| title_fullStr | Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation |
| title_full_unstemmed | Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation |
| title_short | Diffraction Impact onto Regularized Plasma Channel Formation by Femtosecond Laser Filamentation |
| title_sort | diffraction impact onto regularized plasma channel formation by femtosecond laser filamentation |
| topic | femtosecond filamentation regularized array of filaments diffraction Kerr effect |
| url | https://www.mdpi.com/2304-6732/10/8/928 |
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