Principle of Operation
An optical fiber is a cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along its axis, by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer, both of which are made of dielectric materials. To confine the optical signal in the core, the refractive index of the core must be greater than that of the cladding. The boundary between the core and cladding may either be abrupt, in step-index fiber, or gradual, in graded-index fiber.
Read more about this topic: Optical Fibre
Famous quotes containing the words principle of, principle and/or operation:
“From the age of fifteen, dogma has been the fundamental principle of my religion: I know no other religion; I cannot enter into the idea of any other sort of religion; religion, as a mere sentiment, is to me a dream and a mockery.”
—Cardinal John Henry Newman (18011890)
“The first principle of a free society is an untrammeled flow of words in an open forum.”
—Adlai Stevenson (19001965)
“It requires a surgical operation to get a joke well into a Scotch understanding. The only idea of wit, or rather that inferior variety of the electric talent which prevails occasionally in the North, and which, under the name of Wut, is so infinitely distressing to people of good taste, is laughing immoderately at stated intervals.”
—Sydney Smith (17711845)