Multiconical emission at light counterpropagation in a resonant medium

Aa, Afanas'ev; Ba, Samson

doi:10.1103/physreva.53.591

Cited by 7 publications

(1 citation statement)

References 19 publications

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“…The many local foci of the cone cross section seem to move in a random way for successive dye-laser pulses. The observation of instabilities due to mirrorless fourwave mixing oscillation in sodium has been studied by Grynberg et al [31] and Afanas'ev and Samson [32] who have shown that the interplay between self-focusing and saturation effects results in a formation of stable filaments for the case of two counter-propagating pump beams. Harter and Boyd [33] observed FWPM, enhanced by ac-Stark splitting of the levels, in self-trapped filaments of light which seems to explain the instability of the pattern observed in our single-beam propagation experiment.…”

Section: Resultsmentioning

confidence: 99%

Study of the emission in K under two-photon excitation

Efthimiopoulos¹,

Movsessian²,

Katharakis³

et al. 1996

J. Phys. B: At. Mol. Opt. Phys.

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It is shown that by proper use of the excitation spectra, the emission spectra of the transition and the far-field patterns it is possible to distinguish between competing processes involved in the two-photon excitation to the 6S state of potassium, namely: (a) resonant fluorescence emission associated with the cascading spontaneous emission (ASE) and (b) the four-wave mixing parametric process. The effect of the buffer gas on the intensities of the spectra of the radiations emitted is discussed. Conical emission and spatial instabilities of the excitation radiation and the emission were also observed for high excitation and high vapour pressure of potassium.

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Section: Resultsmentioning

confidence: 99%

Study of the emission in K under two-photon excitation

Efthimiopoulos¹,

Movsessian²,

Katharakis³

et al. 1996

J. Phys. B: At. Mol. Opt. Phys.

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Self-focusing, Conical Emission, and Other Self-action Effects in Atomic Vapors

Zerom¹,

Boyd

2009

Topics in Applied Physics

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Fulfilling causality: two numerical techniques for accurately computing the propagation of independent laser beams through a nonlinear medium

Perrin

Gil²,

Lippi³

2005

Appl. Phys. B

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7 pagesWe identify the origin of some numerical difficulties related to causality which appear in the simulation of transport equations. Two numerical techniques are presented for the integration of models describing counter-propagating laser beams in interaction with a nonlinear medium. One, based on the characteristic method, rests on the transport properties of first-order derivatives and is able to propagate a signal in a linear non-dispersive medium without any deformation. The other, fully explicit, directly handles both first and second order derivatives. Both numerical schemes are applied to a physical example

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Multiconical emission at light counterpropagation in a resonant medium

Cited by 7 publications

References 19 publications

Study of the emission in K under two-photon excitation

Study of the emission in K under two-photon excitation

Self-focusing, Conical Emission, and Other Self-action Effects in Atomic Vapors

Fulfilling causality: two numerical techniques for accurately computing the propagation of independent laser beams through a nonlinear medium

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