Amplitude concentration in a phase-modulated spectrum due to femtosecond filamentation

  title={Amplitude concentration in a phase-modulated spectrum due to femtosecond filamentation},
  author={J. V. Thompson and Peter Zhokhov and Matthew Springer and Andrew J. Traverso and Vladislav V. Yakovlev and A M Zheltikov and Alexei V. Sokolov and Marlan O. Scully},
  journal={Scientific Reports},
We present a method by which the spectral intensity of an ultrafast laser pulse can be accumulated at selected frequencies by a controllable amount. Using a 4-f pulse shaper we modulate the phase of the frequency components of a femtosecond laser. By inducing femtosecond filamentation with the modulated pulse, we can concentrate the spectral amplitude of the pulse at various frequencies. The phase mask applied by the pulse shaper determines the frequencies for which accumulation occurs, as well… 
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