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Updated: Jan 23, 2026

Design and Fabrication of an Optical Fiber Made of Water
Published on: November 8, 2018
Analytical study of the numerical aperture of cone-shaped optical fibers: A tool for tailored designs
Brayan Patiño-Jurado1, Juan F Botero-Cadavid1, Jorge Garcia-Sucerquia1
1Universidad Nacional de Colombia - Medellín Campus, School of Physics, Medellín, ANT, 050034, Colombia.
Abstract:
In this work, a set of analytical expressions to tailor the numerical aperture of cone-shaped step optical fibers is proposed. The expressions are derived from the geometrical study of light-ray tracing at the cone-shaped tip of a regular step-index optical fiber. Analysis of the different physical phenomena that can take place at the tip of the fiber led to numerical apertures ranging from 0 to 1.5 which can be achieved via a variety of cone angles, providing great versatility in the design of light sources or light collecting devices based on step-index optical fibers.
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