Experimental study of high-intensity light channels produced on an extended air path by phase and amplitude modulated femtosecond laser pulses
| Autor: | D. V. Apeksimov, Yu. E. Geints, G. G. Matvienko, V. K. Oshlakov, A. A. Zemlyanov |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Applied Optics. 61:1300 |
| ISSN: | 2155-3165 1559-128X |
| DOI: | 10.1364/ao.447023 |
| Popis: | We present the results of our experimental study of the propagation dynamics of high-power femtosecond laser radiation in air with initially imposed amplitude and/or phase modulations. Depending on the modulation type and magnitude, the laser pulse upon nonlinear propagation breaks up into several high-intensity spatially localized light channels, which may or may not contain air plasma and thus are referred to as laser filaments, post-filaments, or plasmaless channels. The pulse modulations are implemented by means of control of the phase or amplitude front using a bimorph deformable mirror or amplitude masks, respectively. We show that the distance of formation and spatial length of high-intensity light channels along a propagation path strongly depend on the shapes and spatial positions of the inhomogeneities created in the transverse phase/amplitude pulse profile, but weakly depend on their sizes. |
| Databáze: | OpenAIRE |
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