Starting from this background, we simulate our MZI [Fig. 5] for each \(\Delta L\) to evaluate the transmission and other important parameter. At Fig. 6 the TE transmission VS wavelengths graph is shown: In this graph is also present the TE transmission when \(\Delta L=0\) in order to appreciate how the variation of \(\Delta L\) operate in a MZI.
Fig. 7 shows the FSR for each case: it is important to notice that, the calculated data fits with the simulated one.