Nonlinear Phase shifts#
- class lasy.propagators.NonlinearKerrStep(n2, k0)[source]#
Class that represents a propagation step with Kerr nonlinearity.
This allows to calculate spectral broadening or self-focusing due to self phase modulation.
\[E (x,y,t) = E(x,y,t) \times \exp(i\,n_2\,k_0\,I(x,y,t))\]where \(I(x,y,t)\) is the intensity profile of the pulse.
- Parameters:
- n2float
Nonlinear (intensity dependent) refractive index.
- k0float
Wave vector at the carrier frequency.
- apply(grid_in, distance, grid_out=None, n2=None, k0=None)[source]#
Apply intensity dependent phase shift to the field.
- Parameters:
- gridGrid
Input grid to which the phase shift is applie.
- distancefloat
Distance over which the pulse propagates the field.
- grid_outGrid, optional
Grid object on which the laser pulse after applying the phase is defined. Can be different from laser grid before applying.