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Liu F, Xi T, Zhang L, Li D, Hao Z. Numerical simulation study on distinguishing nonlinear propagation regimes of femtosecond pulses in fused silica. Sci Rep 2024; 14:5824. [PMID: 38461366 PMCID: PMC10925035 DOI: 10.1038/s41598-024-56460-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024] Open
Abstract
We perform numerical simulations to investigate the nonlinear propagation dynamics of femtosecond Gaussian and vortex beams in fused silica. By analyzing the extent of spectral broadening, we are able to distinguish between the linear, self-focusing, and filamentation regimes. Additionally, the maximum intensity and fluence distribution within the cross-section of the vortex beams are analyzed for different incident laser energies. The results demonstrate a direct correlation between the spectral broadening and the peak intensity of the femtosecond laser pulse. As a result, this provides a theoretical foundation for distinguishing different propagation regimes, and determining critical powers for self-focusing and filamentation of both femtosecond Gaussian and structured beams.
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Affiliation(s)
- Faqian Liu
- Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, China
| | - Tingting Xi
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 101407, China
| | - Lanzhi Zhang
- Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, China
- Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan, 250358, China
- Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East, China Normal University and Shandong Normal University, East China Normal University, Shanghai, 200241, China
| | - Dongwei Li
- Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, China
- Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan, 250358, China
- Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East, China Normal University and Shandong Normal University, East China Normal University, Shanghai, 200241, China
| | - Zuoqiang Hao
- Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, China.
- Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan, 250358, China.
- Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East, China Normal University and Shandong Normal University, East China Normal University, Shanghai, 200241, China.
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