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10/09/12



Tujuan
Mengetahui dan memahami fiber optic dan jenis-jenisnya di berbagai medan
Isi laporan
Fungsi dari fiber optic ini sama saja dengan kabel Coaxial atau sejenisnya yaitu membawa data untuk namun Fiber optic hanya membawa muatan cahaya/infrared yang di konversi menjadi data/voice. Cahaya sebagai gelombang elektro, distribusi medan elektrik dan magnetic yang bergerak saling tegak lurus.
Semakin besar sudut masuk → semakin kecil sudut datang (pembiasan)
Semakin kecil sudut masuk cahaya → semakin kecil modus datanya (modus → 1 cahaya
Jenis-jenis fiber optic :

·         Step index singlemode
·         Step index multimode → sering dipakai di Indonesia
·         Graded index multimode
Sifat fiber optic :

1.       Step index singlemode
a.       Optik SL dengan Diameter core sangat kecil (8-12µm) dibanding ukuran cladding
b.      Cahaya hanya merambat dalam 1 mode sejajar dengan sumbu fiber optic
c.       Transmisi data jarak jauh dengan bitrate tinggi
2.       Step index multimode
a.       Index bias core konstan
b.      Ukuran core besar (50µm) dilapisi dengan cladding yang tipis
c.       Penyambungan kabel mudah karena core besar
d.      Terjadi disperse ( dalam istilah berarti kotor )
e.      Hanya digunakan pada jarak dekat
f.        Transmisi bitrate rendah
Struktur Fiber Optik



 





Macam-macam tipe Fiber Optic menurut CCITT
-          G652 - SingleMode Fiber
-          G653 - Dispertion-Shifted Singlemode Fiber
-          G653 - Characteristics 0f Cut-Off Shfted Mode F-Cable
-          G655 - Dispetior –Shifted Hun Zerodispetion Fiber
Keuntungan Fiber Optik :
1.       Bandwidth lebar, berjalan di frekuensi 1013-1016Hz
2.       Redaman sangat rendah
3.       Kebal gangguan elektromagnetik
4.       Menyalurkan sinyal digital kecepatan tinggi
5.       Memiliki ukuran yang kecil dan ringan
6.       Tidak mengalirkan arus listrik karena terbuat dari kaca
7.       Low cost/minim biaya
8.       Terdiri dari 2 macam : fleksibel dan kaku
9.       System dapat diandalkan (20-30 tahun) dan mudah perawatannya
Kerugian Fiber Optik :
1.       Konstruksi fiber optic lemah sehingga diperlukan lapisan penguat
2.       Karakteristik transmisi dapat berubah bila terjadi tekanan luar
3.       Tidak dapat dialiri arus listrik, sehingga tidak dapat memberikan catuan pada pasangan repeater
4.       Serat kaca bila masuk kulit tidak akan terdeteksi oleh ronsen

Kode warna fiber optic
1.       Biru
      7. Merah
2.       Orange
       8. Hitam
3.       Hijau
9.Kuning
4.       Coklat
10.   Ungu
5.       Abu-abu
11.   Pink
6.       Putih
12.   Torquise

Macam-macam kabel fiber optic
1.       ADSS
2.       OPGW
3.       Figure 8
4.       FTH
5.       FA
Tata cara penyambungan core Fiber Optik dan Patch Core :
Alat dan Bahan :
1.       Kabel Fiber Optik
2.       Patch Core
3.       Miller (pengupas lapisan pada core)
4.       Pengupas Jaket/Coating
5.       Cliver (pemotong core)
6.       Splicer











Simulasi Jaringan menggunakan kabel Fiber Optik jenis ADSS




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