Orbital angular momentum can be used to implement high capacity data
transmission systems that can be applied for classical and quantum
communications. Here we experimentally study the generation and transmission
properties of the so-called perfect vortex beams and the Laguerre-Gaussian
beams in ring-core optical fibers. Our results show that when using a single
preparation stage, the perfect vortex beams present less ring-radius variation
that allows coupling of higher optical power into a ring core fiber. These
results lead to lower power requirements to establish fiber-based
communications links using orbital angular momentum and set the stage for
future implementations of high-dimensional quantum communication over space
division multiplexing fibers.Comment: 13 pages, 6 figure