Page 37 - Flipped book_fiber optics

Light Propagation in a Fiber Optic Cable Index

Profiles: Graded Index

Is a refractive index profile characterized by core having refractive

index that decreases with increasing radial distance from the fiber

axis.

Because parts of the core closer to the fiber axis have a higher refractive

index than the parts near the cladding, light rays follow sinusoidal paths

down the fiber.

The refractive index of the core is lower toward the outside of the fiber.

It bends the rays inward and also allows them to travel faster in the lower

index of refraction region.

A graded-index profile, in which the refractive index varies gradually as a function

of radial distance from the fiber center.