Anomalous infrared conical emission during ordered multifilamentation in gases
We demonstrate that amplitude modulation of a high-peak-power femtosecond laser pulse allows to change fundamentally the frequency-angular structure (FAS) of the supercontinuum formed during the filamentation in both molecular and atomic gases. Particularly, modulation with a 4-hole mask forms an in...
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| Veröffentlicht in: | Optics letters 2025-01, Vol.50 (1), p.13 |
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| creator | Pushkarev, Dmitrii V Bulygin, Andrey D Zhidovtsev, Nikita A Uryupina, Daria S Volkov, Roman V Geints, Yury E Savel'ev, Andrei B |
| description | We demonstrate that amplitude modulation of a high-peak-power femtosecond laser pulse allows to change fundamentally the frequency-angular structure (FAS) of the supercontinuum formed during the filamentation in both molecular and atomic gases. Particularly, modulation with a 4-hole mask forms an inverted pattern of conical emission (CE) with its predominance in the Stokes wing of the pulse spectrum. We explain this phenomenon as a joint effect of self-phase modulation and temporal pulse splitting of interfering beamlets formed by the modulating mask. Our results pave a way for tailoring the frequency-angular structure of a filament-generated supercontinuum. |
| doi_str_mv | 10.1364/OL.542075 |
| format | Article |
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| ispartof | Optics letters, 2025-01, Vol.50 (1), p.13 |
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| language | eng |
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| source | Optica Publishing Group Journals |
| subjects | Amplitude modulation Atomic structure Emission Femtosecond pulsed lasers Femtosecond pulses Infrared lasers Phase modulation |
| title | Anomalous infrared conical emission during ordered multifilamentation in gases |
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