Filamentation in Atmospheric Air with Tunable 1100-2400nm Near-Infrared Femtosecond Laser Source. Academic Article uri icon


  • Intense femtosecond pulse filamentation in open-air has been utilized for long distance optical communication and remote sensing, but it results in nonlinear-effect driven eye hazards which are not addressed by current eye safety standards. A systematic study of filamentation in atmospheric air was performed using a tunable 100fs near-infrared laser (1100nm-2400nm). While undergoing filamentation, each source wavelength was spectrally broadened resulting in supercontinuum and third harmonic generation in the visible and near-IR spectrum. We record the spectra at the center and fringes of the supercontinuum as it is imaged onto a planar surface. In a full beam collection regime, we report the energy of the sub-1000 nm light generation for source wavelengths from 1100nm to 1600 nm and compare the energy density to the maximum permissible exposure values under the ANSI Z136.1 laser safety standard.

published proceedings

  • Sci Rep

altmetric score

  • 0.5

author list (cited authors)

  • O'Connor, S. P., Marble, C. B., Nodurft, D. T., Noojin, G. D., Boretsky, A. R., Wharmby, A. W., Scully, M. O., & Yakovlev, V. V.

citation count

  • 7

complete list of authors

  • O'Connor, Sean P||Marble, Christopher B||Nodurft, Dawson T||Noojin, Gary D||Boretsky, Adam R||Wharmby, Andrew W||Scully, Marlan O||Yakovlev, Vladislav V

publication date

  • August 2019