Cylindrical vector beams and vortex beams, two types of typical singular optical beams
characterized by axially symmetric polarization and helical phase front, possess the unique …

Herein, we have discussed three major methods which have been generally employed for
the generation of optical beams with orbital angular momentum (OAM). These methods …

High-order orbital angular momentum (OAM) modes, namely, OAM_+ 5 and OAM_+ 6, were
generated and demonstrated experimentally by twisting a solid-core hexagonal photonic …

Optical orbital angular momentum (OAM) has become a hot research topic because of its
unique properties due to its spiral distribution of phases. The production and transmission of …

There are great challenges in the generation of higher-order modes for long period fiber
grating (LPFG). The cross-coupling coefficient between the fundamental mode and the …

An all-fiber orbital angular momentum (OAM) mode generator enabling simultaneous
generation of the second-and the third-order OAM modes with conversion efficiencies larger …

An all-fiber orbital angular momentum (OAM) generator enabling direct turning of the
fundamental mode (\rmHE_11 HE_11) to the second OAM modes (l=±2 l=±2) with an …

The third-order orbital angular momentum (OAM_±3) guided mode generation is
demonstrated for the first time, to the best of our knowledge, by employing an asymmetric …

Featured Application In this paper, the basic concepts of fiber modes, the principle of
generation and detection of orbital angular momentum (OAM) modes are exhaustive …

All-fiber mode converters for generating orbital angular momentum (OAM) beams have
many applications in optical communications, optical sensing and lasers. Currently, it is a …