Characteristics of femtosecond laser pulses propagating in multiply ionized rare gases
| Autor: | Katalin Varjú, Valer Tosa, Katalin Kovács, Daniel Ursescu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Femtosecond pulse shaping
Nuclear and High Energy Physics Chemistry business.industry Rate equation Laser 01 natural sciences 010305 fluids & plasmas Pulse (physics) law.invention Optics Multiphoton intrapulse interference phase scan law 0103 physical sciences Femtosecond Atomic physics 010306 general physics business Instrumentation Ultrashort pulse Bandwidth-limited pulse |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 408:271-275 |
| ISSN: | 0168-583X |
| Popis: | A three-dimensional non-adiabatic model in combination with a rate equation model is used to characterize high-intensity (>10 16 W/cm 2 ) femtosecond laser pulse propagation in atomic gas medium. In these conditions the atoms in the target gas will become multiply charged ions, while the laser pulse will propagate in a medium with high electron concentration created by itself. We obtain pulse characteristics in time, frequency and space domain for two representative cases: 800 nm and 267 nm (third harmonic) multi-cycle pulses which are both of practical importance. We show that the spatial-temporal variation of the refractive index in the macroscopic medium is the primary reason for pulse temporal/spectral and spatial shaping during propagation. |
| Databáze: | OpenAIRE |
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