Optical fiber waveguide with effective refractive index profile

摘要

An effective graded index profile optical fiber waveguide comprises alternating regions of high and low indexes of refraction of controlled thickness. The effective refractive index of the fiber has a graded profile of decreasing refractive index when the regions of high index have either a constant or decreasing thickness and the low index regions increase outwardly from the center. The effective refractive index has a particular graded profile of refractive index when the thicknesses of the regions of low refractive index and the high refractive index are appropriately chosen.