Vortex beams have attracted much attention in recent years due to unique features of the
phase or polarization singularity in the center part of beams. Various applications have been …

Edge enhancement, as an important part of image processing, has played an essential role
in amplitude-contrast and phase-contrast object imaging. The edge enhancement of three …

In this work, we fabricate a hybrid waveguide-grating vortex laser in Nd: YSAG by using
femtosecond laser direct writing (FsLDW). The detailed parameters of the hybrid structure …

Optical vortices are getting attention in modern optical metrology. Because of their unique
features, they can be used as precise position markers. In this paper, we show that an …

Edge enhancement is emerging as an essential technique for object recognition in recent
years. The edge detection of three-dimensional (3D) imaging has been successfully …

Optical vortices are stable phase singularities, revealing a zero-point in the intensity
distribution. The localization of this singular point is of significant importance for any …

In this paper, we characterize the helical beam structure through an analysis of the spiral
character of the phase distribution inside a light beam. In particular, we show that a line …

This study presents an innovative application of inkjet printing technology in the construction
of a switchable optical vortex beam generator. The fabrication process involves drop‐on …

Spatial light modulator (SLM) is a modern device extensively used for laser beam shaping.
Over the years, its quality has been significantly improved. Nevertheless, there is still a need …

Edge-enhanced imaging is invaluable in feature extraction, fingerprinting analysis, and
biomedicine due to its ability to accentuate peripheries. Nevertheless, in systems employing …