Mode converters based on periodically perturbed waveguides for Mode Division Multiplexing

Diego Pérez Galacho, Carlos Alonso-Ramos, Delphine Marris-Morini, Vladyslav Vakarin, Xavier Le Roux, Laurent Vivien
2018 Zenodo  
Bandwidth demands in optical communication systems are growing steadily and making Wavelength Division Multiplexing (WDM) reach its limit. New multiplexing techniques are required in order to fulll future bandwidth demands in next generation optical communications. Mode Division Multiplexing (MDM) has been recently proposed as good solution to increase aggregate bandwidth by multiplexing on the spatial domain. In this work we discuss the propositions of ultra-compact mode converters based on
more » ... verters based on periodically perturbed waveguides. A corrugation (perturbation) is periodically inserted on one side of the waveguide. Each time the fundamental mode propagates through a perturbation a part of the incident light is transferred to the second mode. Around 5 periods are only needed to achieve complete power transfer, enabling for ultra-compact devices. Insertion loss below 0:5 dB and extinction ratio higher than 13 dB in the C-Band have been evaluated in a device with a total length of only 12 µm.
doi:10.5281/zenodo.2611346 fatcat:kiygh5gazvanvfbypvyz22p5f4