Open AccessWeak beam self-cleaning of femtosecond pulses in the anomalous dispersion regime
Author(s) -
Yuhang Wu,
Hamed Pourbeyram,
Demetrios N. Christodoulides,
Frank W. Wise
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.430926
Subject(s) - femtosecond , optics , dispersion (optics) , materials science , multi mode optical fiber , nanosecond , self focusing , self phase modulation , beam (structure) , wavelength , pulse (music) , kerr effect , femtosecond pulse shaping , nonlinear optics , optical fiber , laser , physics , laser beams , nonlinear system , quantum mechanics , detector
Kerr beam cleaning in graded-index multimode fiber has been investigated in experiments with sub-nanosecond pulses and in experiments with femtosecond pulses at wavelengths where the dispersion is normal. We report a theoretical and experimental study of this effect with femtosecond pulses and anomalous dispersion. In this regime, only weak beam cleaning is observed experimentally, along with strong temporal evolution of the pulse. Numerical simulations exhibit the qualitative trends of the experiments.