Multiple filamentation of collimated Ti:Sapphire laser beams in water

Apeximov, D. V.; Букин, О. А.; Golik, S. S.; Zemlyanov, A. A.; Kabanov, A. M.; Kuchinskaya, O. I.; Mayor, A. Yu.; Matvienko, G. G.; Oshlakov, V. K.; Petrov, A. D.; Sokolova, E. B.; Khoroshaeva, E. E.

doi:10.1134/s1024856015030033

Cited by 2 publications

(2 citation statements)

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“…Note that for the same parameters, simple use of the Marburger formula [19] incorrectly predicts L SF = 2 m for the collapse-, or filament onset-length in water. Our result is in agreement with the experiments performed by Apeximov et al [20], who find that their collimated beam with similar properties produces single filaments at P in ∼ 3100 P NL in water, and multiple filaments at higher powers. Table I shows the filament probability p(≥ 1), the probability of the laser shot producing one or more filaments, for different values of C 2 n at distance z = 18 cm.…”

Section: Resultssupporting

confidence: 93%

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Triggering filamentation using turbulence

Eeltink¹,

Berti²,

Marchiando³

et al. 2016

Phys. Rev. A

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We study the triggering of single filaments due to turbulence in the beam path for a laser of power below the filamenting threshold. Turbulence can act as a switch between the beam not filamenting and producing single filaments. This 'positive' effect of turbulence on the filament probability, combined with our observation of off-axis filaments suggests the underlying mechanism is modulation instability caused by transverse perturbations. We hereby experimentally explore the interaction of modulation instability and turbulence, commonly associated with multiple-filaments, in the single-filament regime.Comment: 5 pages, 6 figure

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Section: Resultssupporting

confidence: 93%

“…At a pulse power of P in = 14.2 GW and in an unperturbed atmosphere, filaments are absent in the watercell. This may seem surprising as the incident power widely exceeds the P NL,water = 6.5 MW [20] for λ = 800 nm. Indeed, experiments in water are commonly performed at much lower power.…”

Section: Resultsmentioning

confidence: 99%