Fiber optic structureI (Source: Samuel, 1988) Core dan cladding temade of silica material, glass, orPlastic ber bertin qualityggi and free water. Core has an index blarger scale of cladding (n1 > n2) to the limit critical, so it's possiblekan occurrence of refractionin total (total internal reflection ). Withthereby the light will always bepropagate in the core to the ends of the fibers. Coating ( jacket ) worksas the core protector and cladding of t ekanan physical outside, made of very plastic material quality (Zanger, 1991, Thomas, 1995, Samuel,1988). Optical fibergenerally classified medoggy 3 types (Figure 4) (Samuel, 1988): 1. Multimode Step Index , with finger-jari core 25 – 60 µm, cladding 50 – 150 µm. 2. Multimode Graded Index , with fingers core 10 – 35 µm,...
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