Space-division multiplexing (SDM) uses multiplicity of space channels to increase capacity
for optical communication. It is applicable for optical communication in both free space and …

Photonic lanterns are made by adiabatically merging several single-mode cores into one
multimode core. They provide low-loss interfaces between single-mode and multimode …

Beams carrying orbital-angular-momentum (OAM) have gained much interest due to their
unique amplitude and phase structures. In terms of communication systems, each of the …

Spatial modes have received substantial attention over the last decades and are used in
optical communication applications. In fiber-optic communications, the employed linearly …

Current optical communication systems rely almost exclusively on multimode fibres for short-
and medium-haul transmissions, and are now expanding into the long-haul arena. Ultra …

The demonstration of a three‐dimensional tapered mode‐selective coupler in a photonic
chip is reported. This waveguide‐based, ultra‐broadband mode multiplexer was fabricated …

Simple all-fiber three-mode multiplexers were made by adiabatically merging three
dissimilar single-mode cores into one multimode core. This was achieved by collapsing air …

The theory of mode-sorting in bimodal asymmetric Y-junctions is extended to multimode
asymmetric Y-junctions with multiple output arms. This theory allows for the optimization of …

Few-mode fiber (FMF) supporting many modes with weak-coupling is highly desired in
mode division multiplexing (MDM) systems. The multi-parameter design of FMF becomes …

The excitation and separation of individual modes in a few-mode optical fiber network can
be realized using mode-selective couplers. For excitation at the beginning of the fiber, two …