Breakup and fusion of self-guided femtosecond light pulses in air.

  title={Breakup and fusion of self-guided femtosecond light pulses in air.},
  author={S. Tzortzakis and L. Berg{\'e} and A. Couairon and M. Franco and B. Prade and A. Mysyrowicz},
  journal={Physical review letters},
  volume={86 24},
We report experiments showing the breakup and the merging of filaments formed by the modulational instability of femtosecond optical pulses in air. For input powers as high as 25 times the self-focusing threshold, the beams are shown to split into two spots, which coalesce into a self-guided beam. This effect occurs in an optically Kerr regime and plays an important role in the guiding process. Numerical simulations and theoretical estimates both support the comparison with the experimental… Expand

Figures and Topics from this paper

Infrared femtosecond light filaments in air: simulations and experiments
Experiments in which several-meter-long infrared ultrashort laser pulses are guided in air are compared with numerical simulations. During a first self-focusing stage that is affected by modulationalExpand
Direct characterization of self-guided femtosecond laser filaments in air.
An apparently novel diagnostic is used to directly measure the fluence distribution of femtosecond laser pulses after they have formed self-guided optical filaments in air, allowing filament characteristics such as energy and size to be unambiguously determined for the first time. Expand
Self-focusing and Filamentation of Femtosecond Pulses in Air and Condensed Matter: Simulations and Experiments
We review the evolution of the modeling of femtosecond filamentation in transparent media from the monochromatic self-trapping model to the development of numerical models including all relevantExpand
Interaction of noncollinear femtosecond laser filaments in sapphire
The interaction of two coherent femtosecond laser pulses, propagating at a small angle with respect to each other in a sapphire crystal in the filamentation regime, has been investigated numericallyExpand
Self-focusing of a focused femtosecond laser pulse in air
The regularities of self-focusing and filamentation of spatially focused ultra-short laser radiation in air are theoretically considered. The relationship between beam focusing sharpness andExpand
Femtosecond and picosecond ultraviolet laser filaments in air: experiments and simulations
We report a study of the long-range self-guided propagation of intense femtosecond and picosecond UV laser pulses in air. Measurements of the laser beam profile along the propagation axis togetherExpand
Self-focusing and Filamentation of Powerful Femtosecond Laser Pulses
The physical picture of the phenomenon of filamentation of a powerful femtosecond laser pulse in the bulk of a transparent dielectric is considered on the basis of the experimental results at LavalExpand
Numerical simulations of ultrashort laser pulse multifilamentation in fused silica: plasma channels statistics
The regime of multiple filamentation of gigawatt-power femtosecond laser pulses in fused silica bars is theoretically investigated. Numerical simulations are used to analyze the fine spatialExpand
Fusion of regularized femtosecond filaments in air: Far field on-axis emission
The fusion of several coherent 800 nm femtosecond filaments is induced experimentally and numerically by transmitting a beam through a mask with circular apertures followed by the focusing lens. TheExpand
Propagation of twin laser pulses in air and concatenation of plasma strings produced by femtosecond infrared filaments
Two consecutive ultrashort laser pulses separated by 100 fs and polarized in orthogonal directions are shown to form a long femtosecond filament that connects both filaments created independently byExpand


  • Plasmas 7, 193 (2000); L. Bergé and A. Couairon, Phys. Plasmas 7, 210
  • 2000
  • Quantum Electron. 4, 35
  • 1975
  • Rev. Lett. 83, 2938
  • 1999
Quantum Electron
  • 24, 905
  • 1994
  • Phys. JETP 20, 1307
  • 1965