Quadruply Clad Fiber

In fiber optics, a quadruply clad fiber is a single-mode optical fiber that has four claddings. Each cladding has a refractive index lower than that of the core. With respect to one another, their relative refractive indices are, in order of distance from the core: lowest, highest, lower, higher.

A quadruply clad fiber has the advantage of very low macrobending losses. It also has two zero-dispersion points, and moderately low dispersion over a wider wavelength range than a singly clad fiber or a doubly clad fiber.

Famous quotes containing the words clad and/or fiber:

    A yeman hadde he and servantz namo
    At that tyme, for hym liste ride so,
    And he was clad in cote and hood of grene.
    Geoffrey Chaucer (1340?–1400)

    I am an invisible man.... I am a man of substance, of flesh and bone, fiber and liquids—and I might even be said to possess a mind. I am invisible, understand, simply because people refuse to see me.
    Ralph Ellison (b. 1914)