May 15, 2020

Self-similar propagation of optical pulses in quartic normal dispersion fibers

  • Alavandi P.
  • Alexander T.
  • Blanco-Redondo A.
  • De Sterke M.
  • Hudson D.
  • Newton J.
  • Runge A.

We study the propagation of ultrashort pulses in optical fiber with gain and normal quartic dispersion by self-similarity analysis of the modified nonlinear Schrödinger equation. We find an exact asymptotic solution, corresponding to a triangle-like, T^4/3 intensity profile, with a T^1/3 chirp. Our solution is confirmed by numerical simulations. This solution follows different amplitude and width scaling compared to the conventional case with quadratic dispersion. We also suggest, and numerically investigate, a fiber laser cavity built from optical components with normal quartic dispersion which emits quartic self-similar pulses.

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