Overlap Integral

The computed waveguide mode can be used to find the overlap integral with another mode, such as <E1(y) | f(y) | E2(y)> where f(y) is the function over which the integral is performed, where E1(y) is the computed field distribution and E2(y) can be the same as E1(y) or the output from another mode calculation. In the latter case, the tag number of that calculation can be entered to perform the overlap.

The function f(y) can be entered the same was as the refractive index, or trial function.