Introduction Orbital angular momentum (OAM) modes have emerged as a promising candidate for dramatically expanding the information-carrying capacity of optical fibers. Unlike conventional modes that carry only spin angular momentum, OAM modes possess a helical phase front characterized by an azimuthal phase dependence of the form $\exp(i\ell\phi)$, where $\ell$ is the topological charge and $\phi$ […]
Designing Photonic Crystal Fibers for OAM Modes : Photonic crystal fibers (PCFs) represent a class of optical fibers that incorporate periodic microstructures—typically arrays of air holes in a silica matrix—to guide light through modified refractive index profiles. These structures offer highly tunable modal characteristics, which are essential in specialized applications such as nonlinear optics, sensing, […]
