Since its discovery, quantum entanglement has challenged some of the best established
views of the world: locality and reality. Quantum technologies promise to revolutionize …

We report on the design and characterization of ring-assisted (RA) few-mode fibers with
improved minimum mode effective index difference MinΔn eff. By introducing a high-index …

Recovery of optical phases using direct intensity detection methods is an ill-posed problem
and some prior information is required to regularize it. In the case of multi-mode fibers, the …

Spin-orbit interactions (SOIs) of circularly polarized beam and circularly polarized vortex
beam during paraxial propagation in a radial gradient-index (GRIN) fiber are analyzed using …

Non-mode-selective (NMS) multiplexers (muxes) are highly desirable for coherent power
combining to produce a high-power beam with a shaped profile (wavefront synthesis) from …

The idea of adopting the space domain as the next frontier for optical communication has
received increasing attention in the last few years. Optical devices are the integral parts of a …

Quantum communication aims to provide absolutely secure transmission of secret
information. State-of-the-art methods encode symbols into single photons or coherent light …

This letter proposes a three-dimensional (3D) geometric shaping (GS) and probabilistic
shaping (PS) constellation based on a regular octahedral structure in mode-division …

The characteristics of the cylindrical vector beam (CVB) and the cylindrical vector vortex
beam (CVVB) in a radial gradient-index (GRIN) fiber are analyzed on the basis of the …

Multimode fibers provide a promising platform for realizing high-power laser amplifiers with
suppressed nonlinearities and instabilities. The potential degradation of optical beam quality …