An optical fiber consisting of a core with a single uniform index of refraction, surrounded by a cladding with another single uniform index of refraction. The index of refraction "steps down" as light travels from the core to the cladding. When graphed as a function of distance from the fiber axis, the index of refraction has the shape of a step function. Light is trapped in a step-index fiber by total internal reflection.
An optical fiber in which the core is of a uniform refractive index with a sharp decrease in the index of refraction at the core/cladding interface.
Optical Fiber which has an abrupt change in its refractive index, due to a core and cladding that have different indices of refraction. Typically used for singlemode.
A fiber in which the core is of a uniform refractive index, & there's a sharp decrease in the index of refraction at the cladding.
Optical fibers have a cylindrical core and are surrounded by a cladding. The refractive index of the core is always higher than that of the cladding. If both these indexes are uniform across the cross-sections, then the fiber is classed as a step-index fiber. Light travels along the fiber in a straight line.
An optical fiber, either multimode or single mode, in which the core refractive index is uniform throughout so that a sharp step in refractive index occurs at the core-to-cladding interface. It usually refers to a multimode fiber.
Fiber that has a uniform index of refraction throughout the core that is a step below the index of refraction in the cladding.