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Journal of ISSN Industrial Engineering Systems

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, cladding 50 – 80 µm. 3. Monomode Step index ,  jari-jaricore 1 -16 µm, cladding 10 – 100 µm.  input outputProfilerefractive indexn1n 2n1n 2n 2S 2 S 1S 3 (a). Multimode fiber optic step index  (b). Multimode optical fiber graded index  (c). Optical fiber step index monomode  Figure 4: Classification of optical fibers (Source: Thomas, 1995)  To date, fiber  optic channels are manufacturedfrom te best glass  materials   is  capableprovide attenuation (loss-loss) only 0.2 dB / km, and  capable bwork on frequency of above  1  GHz(Singer, 1991). 
fiber cable installer
In fiber optic communication  systems , every     the tip of the tar fibercan an  optical connector that isworks  to  catch upng  and  memuthe pain the ends of the fiber. KThis onector is usually used at  the  end points of the  serat  as  on transmitter, receiver,  connection between  fibers, andon the repeater . Connectors have to be    provide  relationshipswith redaman (loss-rugive) that is minimal  and can be  mounted and foldeds easily.  6. Excellence in Optical Fiber  Optical fiber  mehave  several  advantagescompared with other transmission media, among them are  as follows  (Zanger, 1991,Thomas, 1995): • Has field width (    bandwidth )  thatvery wide. • Very small fiber size and cheap. • The light signal is not affected by     electric and magnetic fieldsk. • The signal in the fiber is guaranteed     its safety. • No spark will occur  because inside fiber there is no electric power. Besidesthat,  fiber is  also  resistant  to toxic  gases  ,materials  chemistrythis you haver so that it can be grown in the ground. • Redaman very rego up able to used for  communication jfar away wine  withoutamplifier and repeater . Over thereg advantages  ,

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