Linear multimode optical systems have enabled clean experimental observations and the
applications of numerous phenomena that continually extend the boundaries of wave …

Time, polarization, and wavelength multiplexing schemes have been used to satisfy the
growing need of transmission capacity. Using space as a new dimension for communication …

Abstract Space-division multiplexing (SDM), as a main candidate for future ultra-high
capacity fibre-optic communications, needs to address limitations to its scalability imposed …

An optical vortex having an isolated point singularity is associated with the spatial structure
of light waves. A polarization vortex (vector beam) with a polarization singularity has …

Orbital angular momentum (OAM), which describes the “phase twist”(helical phase pattern)
of light beams, has recently gained interest due to its potential applications in many diverse …

We propose a family of ring-core fibers, designed for the transmission of OAM modes, that
can be fabricated by drawing five different fibers from a single preform. This novel technique …

Angular momentum, a fundamental physical quantity, can be divided into spin angular
momentum (SAM) and orbital angular momentum (OAM) in electromagnetic waves. Helically …

Orbital angular momentum (OAM) modes, having unique properties of a helical phase
structure and doughnut intensity profile, have been widely studied in fiber-optic …

A dual-cladding photonic quasi-crystal fiber is theoretically proposed to robustly transmit
orbital angular momentum (OAM) modes. This fiber, based on conventional silica …

Light carries both orbital angular momentum (OAM) and spin angular momentum (SAM),
related to wavefront rotation and polarization, respectively. These are usually approximately …