qspec.saturation  (  intensity ,  f ,  a ,  a_dipole  )[source]

The saturation parameter $s = I / I_0$, with the saturation_intensity $I_0$.

Parameters:

intensityarray_like

The intensity of the laser ($\mu$W/mm² = W/m²).

farray_like

The frequency $f$ of the transition $|i\rangle\rightarrow|k\rangle$ (MHz).

aarray_like

The Einstein $A_{ki}$ coefficient (MHz).

a_dipolearray_like

The reduced dipole coefficient of the transition (see qspec.a_dipole).

Returns:

sndarray

The saturation parameter $s$.