There will be 5 different Mach-Zhender Interferometer designs, and two cascaded MZI designs. I decided to test the fiber couplers (TE/TM polarization) and Y-branch.

Table \ref{tab:mzi} shows the 7 different variations of the MZI design according to polarization and path length difference. also, the FSR at 1550 nm with a group index of 4.2 is estimated for each path length difference.