dear all
OptiGrating is for analysing the effect of gratings in optical fibres or other waveguides. It is true that propagation outside the waveguide is not considered, as this is outside the scope of the software’s function. The initial condition supposes unit power in a fibre or waveguide mode. OptiGrating then calculates the power the grating(s) scatter into other waveguide modes (or to the back propagating direction).
If your simulation includes coupling into and out of the waveguide, OptiGrating by itself will not do your simulation. The OptiGrating results could be used as part of the simulation, but they will not be the entire solution.
this is the reply of the optiwave.
when my freind asked them about the coupling problem