Various splitter structures were compared, and multimode interference (MMI) waveguides and directional couplers were selected to interconnect different stages, minimizing wavelength-dependent losses. his article will introduce the three multiplexing technologies of WDM, TDM, and SDM, and will also compare the advantages and disadvantages of WDM, TDM, and SDM Expansion Methods. Through this article, you will have a better understanding of what is multiplexing. Multiplexing stands as the. Ring resonators are essential components in silicon photonics with a wide range of applications, such as modulating, adding, and dropping signals in an optical communication system with wavelength division multiplexing (WDM). However, the performance of conventional circular rings is limited by. Silicon-based wavelength-division-multiplexing (WDM) optical interconnection networks have recently been emerged as an effective solution in the datacenter to cope with the ever-increasing data traffic thanks to high data throughput and low power consumption. The device utilizes cascaded Mach–Zehnder interferometers (MZIs) based on a planar lightwave circuit (PLC) to achieve flat passbands with wide bandwidth.