piel.models.frequency.photonic.directional_coupler_length# Translated from flaport/sax or flaport/photontorch Functions# directional_coupler_with_length([length, coupling, ...]) Module Contents# directional_coupler_with_length(length=1e-05, coupling=0.5, loss=0, neff=2.34, wl0=1.55e-06, ng=3.4, phase=0)[source]#