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- W2070147689 abstract "The interaction of two femtosecond filaments has been studied in single-crystal sapphire at small crossing angles 1.2° ÷5°. Regular multifilament pattern (MFP) can be formed in the overlapping area of two beams, which depends on thepulse energy, crossing angle, and phase difference. As a special realization of MFP, formation of a single filament fromtwo different pump beams was for the first time observed. The number of filaments in the MFP depends on the numberof the interference maxima in overlapping area, whose power exceeds critical power for self-focusing. We demonstratecontrol of multifilament pattern, changing the phase shift between the interacting beams. Attraction and repulsion of thefilaments is observed in vicinity of the overlapping region for both in- and counter-phase beams depending on theposition Z along the propagation axis. Transformation of near- and far-field images of the single filament, formed by twopump beams, and spectra of its axial emission have been studied depending on the filament length. It has been shown thatfour-wave mixing plays a major role in forming the axial emission spectrum." @default.
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- W2070147689 date "2010-09-10" @default.
- W2070147689 modified "2023-09-27" @default.
- W2070147689 title "Interaction of femtosecond filaments in sapphire" @default.
- W2070147689 doi "https://doi.org/10.1117/12.881013" @default.
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