In order to overcome the capacity limitations of current lightwave systems based on the
single-mode optical fiber, massively parallel transmission in the spatial domain [space …

The tremendous growth of data traffic has spurred a rapid evolution of optical
communications for a higher data transmission capacity. Next-generation fiber-optic …

Recently developed PLC-based mode multi/demultiplexers (MUX/DEMUXs) for mode
division multiplexing (MDM) transmission are reviewed. We firstly show the operation …

We propose a mode-conversion platform based on cascaded long-period waveguide
gratings. We demonstrate two specific devices by cascading a surface-corrugated grating …

Mode-division multiplexing (MDM) has attracted much attention due to its ability to further
increase the transmission capacity of optical interconnects. While further developments of …

We propose a horizontal directional coupler formed with two parallel waveguides of different
heights. By breaking the symmetry in both the horizontal and the vertical direction, this …

A broadband and low-loss two-mode (LP_01/LP_11a) multi/demultiplexer (MUX/DEMUX)
based on a planar lightwave circuit (PLC) is designed by a wavefront matching method …

Ultra-low-loss all-fiber mode selective couplers (MSCs) have been designed and fabricated
using fused biconical taper technique with precise control on phase matching condition. An …

We propose a lithium-niobate optical waveguide asymmetric directional coupler for the
realization of an electro-optically switchable mode (de) multiplexer. Our typical fabricated …

With intensive computation, we analyze in detail butt-coupling between few-mode fibers and
buried channel waveguides and discuss, in particular, the conditions to achieve mode …