
48 Optical Fiber Communication Systems with MATLAB
®
and Simulink
®
Models
(a)
(b) (c)
FIGURE 2.15
(a)
Schematic of a ber deposition and fabrication of ber preform, deposition of core material and collapsing.
(b) Fiber preform, before drawing into ber stands. (c) Cross section of ber preform with refractive index pro-
le
exactly the same as the ber-index prole of single-mode (upper) and multimode (lower) types.