Self-action of partly coherent laser radiation

Aleshkevich, V. A.; Kozhoridze, G. D.; Matveev, А. N.

doi:10.1070/pu1991v034n09abeh002472

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…The evolution of transverse size (radius) of an incoherent laser pulse within such a model was discussed in many papers (see, for instance, Refs. [7,8]). This approximation is sufficient for Kerr media in which the nonlinear frequency shift is proportional to the laser field intensity integrated over time or space, because such an integration effectively accomplishes statistical averaging (see, for instance, Ref.…”

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confidence: 99%

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Malkin

Fisch

2016

Phys. Rev. Lett.

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Powerful incoherent laser pulses can propagate in focusing Kerr media much longer distances than can coherent pulses, due to the fast phase mixing that prevents transverse filamentation. This distance is limited by 4-wave scattering, which accumulates waves at small transverse wavenumbers, where phase mixing is too slow to retain the incoherence and thus prevent the filamentation. However, we identify how this theoretical limit can be overcome by countering this accumulation through transverse heating of the pulse by random fluctuations of the refractive index. In these new regimes, the laser pulse propagation distances are significantly extended, making feasible a new class of random lasers, in particular, ultra-powerful random lasers in plasmas.

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confidence: 99%

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Malkin

Fisch

2016

Phys. Rev. Lett.

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“…Self‐phase modulation was known to impact the optical spectrum of partially coherent optical waves. [ 26,35‐39 ] In order to quantify how the properties of the incoherent waves were affected, a series of measurements according to the input average power were carried out. The experimental evolution of the power spectrum as a function of the input power was summarized in panels (a1) and (b1) of Figure 6 .…”

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confidence: 99%

Linear and Nonlinear Fiber Propagation of Partially Coherent Fields Exhibiting Temporal Correlations

2020

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Using an ultrafast photonic first-order differentiator applied on a partially coherent field, the generation of two correlated temporal waveforms is reported and their correlation properties upon linear and nonlinear propagation along the two orthogonal polarization axes of a dispersive optical fiber are studied. Temporal correlations are maintained in linear propagation whereas Kerr nonlinearity generates anticorrelated temporal intensity patterns for both partially and uncorrelated fields. Experiments are in close agreement with the theoretical analysis.

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The filamentation effect in short pulse amplification by strong-coupling stimulated Brillouin scattering

Zuo

et al. 2019

Physics of Plasmas

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The filamentation instability in strong-coupling stimulated Brillouin scattering (sc-SBS) amplification is investigated, and the growth rate and threshold power of filamentation are calculated. Theory and simulation results show that the filamentation instability destroys the amplified seed profile in sc-SBS amplification within a typical parameter region. An increase in the plasma density, which can increase the sc-SBS growth rate and avoid Raman scattering, exacerbates the filamentation instability. The relativistic effect is shown to be the main source of filamentation; however, introducing spatiotemporal incoherence into the seed pulse can greatly alleviate the filamentation instability.

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Self-action of partly coherent laser radiation

Cited by 5 publications

References 6 publications

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Linear and Nonlinear Fiber Propagation of Partially Coherent Fields Exhibiting Temporal Correlations

The filamentation effect in short pulse amplification by strong-coupling stimulated Brillouin scattering

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