Abstract In this paper hydrodynamic processes arisen in the silica under laser action are analyzed numerically. Exactly these processes determine the development of fracture of optical fiber under the action of high-intense laser beams. The mathematical model describing the wave processes inside the core and cover of an optical fiber is proposed. It is shown that the basic mechanism of high-speed fracture wave propagation is related to the plasma expansion into the cold silica. At the same time, the transverse waves define the development of the plasma bubble and as a result the destruction of the optical fiber core. Obtained hydrodynamic mechanisms are basic for a wide class of scenarios related to the interaction of high-energy fluxes with solid medium.
Highlights Hydrodynamic processes involved in laser-induced silica fracture are overviewed. A mathematical model is proposed to describe wave processes in silica. The fracture is mainly due to the expansion of hot plasma into the cold silica. The plasma bubble structure is affected by transverse shock and rarefaction waves.
Hydrodynamic processes determining the silica fracture under the action of high-intense laser
Acta Astronautica ; 176 ; 662-665
2020-01-07
4 pages
Article (Journal)
Electronic Resource
English
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