Comparing Strip-type and Rib-type Demultiplexers from a Fabrication Tolerance Point of View

Abstract

We investigated the fabrication tolerance of demultiplexers for coarse wavelength division multiplexing. Regarding the transverse electric mode input, the cascaded Mach-Zehnder interferometers using rib-type waveguide as a demultiplexer was found to be more robust than that using strip-type waveguide.