Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides
The propagation of femtosecond pulses in guided structures is a matter of both fundamental and practical interest in nonlinear optics. In particular, hollow-core waveguides (HCWs) filled with a gas medium are fabricated and used as devices for the generation of attosecond pulses from high-order harm...
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MDPI AG
2025-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/1/65 |
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| author | Valer Tosa Ana Maria Mihaela Gherman Katalin Kovacs István Tóth |
| author_facet | Valer Tosa Ana Maria Mihaela Gherman Katalin Kovacs István Tóth |
| author_sort | Valer Tosa |
| collection | DOAJ |
| description | The propagation of femtosecond pulses in guided structures is a matter of both fundamental and practical interest in nonlinear optics. In particular, hollow-core waveguides (HCWs) filled with a gas medium are fabricated and used as devices for the generation of attosecond pulses from high-order harmonics. In this process, the configuration of the laser field (intensity and phase) inside the waveguide is of crucial importance for enhancing the (well-known, low) efficiency of high-order harmonic generation (HHG). Here, we present numerical calculations which demonstrate the main features of the propagation process in fabricated HCWs. We consider a variety of experimental parameters like gas pressure, waveguide size, laser wavelength, and pulse energy and duration. In particular, the beam profile at the fiber input is found to be a sensitive parameter which influences the whole evolution of the laser field along the propagation. Our model is based on a split-step method modified to account for propagation in ionized media and is validated against experimental and theoretical data from the literature. Our results contribute to the description of the main features of beam propagation in HCWs and provide guiding directions for designing efficient configurations for HHG. |
| format | Article |
| id | doaj-art-57a1f7f475ef46dd8d3746a75b968f7b |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-57a1f7f475ef46dd8d3746a75b968f7b2025-01-24T13:46:23ZengMDPI AGPhotonics2304-67322025-01-011216510.3390/photonics12010065Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core WaveguidesValer Tosa0Ana Maria Mihaela Gherman1Katalin Kovacs2István Tóth3National Institute for R&D of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, RomaniaNational Institute for R&D of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, RomaniaNational Institute for R&D of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, RomaniaNational Institute for R&D of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, RomaniaThe propagation of femtosecond pulses in guided structures is a matter of both fundamental and practical interest in nonlinear optics. In particular, hollow-core waveguides (HCWs) filled with a gas medium are fabricated and used as devices for the generation of attosecond pulses from high-order harmonics. In this process, the configuration of the laser field (intensity and phase) inside the waveguide is of crucial importance for enhancing the (well-known, low) efficiency of high-order harmonic generation (HHG). Here, we present numerical calculations which demonstrate the main features of the propagation process in fabricated HCWs. We consider a variety of experimental parameters like gas pressure, waveguide size, laser wavelength, and pulse energy and duration. In particular, the beam profile at the fiber input is found to be a sensitive parameter which influences the whole evolution of the laser field along the propagation. Our model is based on a split-step method modified to account for propagation in ionized media and is validated against experimental and theoretical data from the literature. Our results contribute to the description of the main features of beam propagation in HCWs and provide guiding directions for designing efficient configurations for HHG.https://www.mdpi.com/2304-6732/12/1/65femtosecond pulseshollow-core waveguidesplit-step methodpropagationscaling |
| spellingShingle | Valer Tosa Ana Maria Mihaela Gherman Katalin Kovacs István Tóth Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides Photonics femtosecond pulses hollow-core waveguide split-step method propagation scaling |
| title | Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides |
| title_full | Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides |
| title_fullStr | Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides |
| title_full_unstemmed | Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides |
| title_short | Modeling Femtosecond Beam Propagation in Dielectric Hollow-Core Waveguides |
| title_sort | modeling femtosecond beam propagation in dielectric hollow core waveguides |
| topic | femtosecond pulses hollow-core waveguide split-step method propagation scaling |
| url | https://www.mdpi.com/2304-6732/12/1/65 |
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