title: Angle-resolved multioctave supercontinua from mid-infrared laser filaments.
abstract: Angle-resolved spectral analysis of a multioctave high-energy supercontinuum output of mid-infrared laser filaments is shown to provide a powerful tool for understanding intricate physical scenarios behind laser-induced filamentation in the mid-infrared. The ellipticity of the mid-infrared driver beam breaks the axial symmetry of filamentation dynamics, offering a probe for a truly (3+1)-dimensional spatiotemporal evolution of mid-IR pulses in the filamentation regime. With optical harmonics up to the 15th order contributing to supercontinuum generation in such filaments alongside Kerr-type and ionization-induced nonlinearities, the output supercontinuum spectra span over five octaves from the mid-ultraviolet deep into the mid-infrared. Full (3+1)-dimensional field evolution analysis is needed for an adequate understanding of this regime of laser filamentation. Supercomputer simulations implementing such analysis articulate the critical importance of angle-resolved measurements for both descriptive and predictive power of filamentation modeling. Strong enhancement of ionization-induced blueshift is shown to offer new approaches in filamentation-assisted pulse compression, enabling the generation of high-power few- and single-cycle pulses in the mid-infrared.
authors.forename: A V
authors.initials: AV
authors.lastname: Mitrofanov
authors.forename: A A
authors.initials: AA
authors.lastname: Voronin
authors.forename: D A
authors.initials: DA
authors.lastname: Sidorov-Biryukov
authors.forename: S I
authors.initials: SI
authors.lastname: Mitryukovsky
authors.forename: M V
authors.initials: MV
authors.lastname: Rozhko
authors.forename: A
authors.initials: A
authors.lastname: Pugžlys
authors.forename: A B
authors.initials: AB
authors.lastname: Fedotov
authors.forename: V Ya
authors.initials: VY
authors.lastname: Panchenko
authors.forename: A
authors.initials: A
authors.lastname: Baltuška
authors.forename: A M
authors.initials: AM
authors.lastname: Zheltikov