Optical spatiotemporal pulse train solitons

Three dimensional optical spatiotemporal solitons (sometimes referred to as “light bullets”) are packets of self-localized electromagnetic radiation that propagate without spreading out despite diffraction and group-velocity dispersion. We are working to generate three dimensional spatiotemporal pulse-train solitons where the train of pulses is self-trapped in space due to a slowly responding self-focusing nonlinearity and each pulse is self-localized in the propagating direction by fast nonlinearity [1]. In a preliminary experiment, we demonstrated self-spectral broadening of a pulse train spatial soliton [2].¬†Recently, we demonstrated experimentally spatially-bright temporally-dark three dimensional spatiotemporal pulse train solitons.

Linear diffraction and dispersion of an optical pulse


Spatiotemporal pulse train soliton


  1. H. C. Gurgov and O. Cohen, Spatiotemporal pulse-train solitons, Opt. Express 17, 7052 (2009)
  2. O. Lahav, H. Gurgov, P. Sidorenko, O. Peleg, L. Levi, A. Fleischer, and O. Cohen, Self-phase modulation spectral broadening in two-dimensional spatial solitons: toward three-dimensional spatiotemporal pulse-train solitons , Opt. Lett. 37, 5196 (2012)
  3. O. Lahav, O. Kfir, P. Sidorenko, M. Mutzafi, A. Fleischer and O. Cohen, Three-dimensional spatiotemporal pulse-train solitons, Phys. Rev. X 7, 041051 (2017)
  4. News & Views by F. Wise, Solitons divide and conquer, Nature, 554, 179 (2018)