step-index fiber

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step-index fiber

A multimode or singlemode optical fiber with a uniform refractive index throughout the core. The step is the shift between the core and the cladding, which has a lower refractive index. See graded-index fiber, dispersion-shifted fiber and dispersion.
References in periodicals archive ?
Although Bessel functions represent the eigenmodes for step-index profile fibers, our calculation method exhibits better convergence which must be attributed to the analytical differentiation of the matrix equation as opposed to numerical differentiation in [3].
Schematic refractive index profiles: (a) infinitely extended parabolic profile; (b) step-index profile; (c) truncated parabolic profile; (d) arbitrary profile.
(a) Dispersion and (b) dispersion slope for the truncated parabolic profile fiber from Figure 4(a); (c) dispersion and (d) dispersion slope for the step-index profile fiber from Figure 4(b).
The microfiber is assumed to have a circular cross-section with refractive index (RI) of 1.465 and a step-index profile [6].