Mach-Zehnder Filter Using Multiple Si Waveguide Structure Sections With Polarization Independence Or Splitter Function Attained By Custom-Made Interference Conditions

We report the Mach-Zehnder interferometer wavelength filter using multiple Si wire waveguide structure sections. The property of the phase shift or interference conditions can be designed to attain many types of functionality. The polarization insensitive device was obtained in the experiment. The polarization beam splitting can also be achieved by dedicated design procedure.