Ciri-ciri Optik
Daripada semua perbezaan antara multimod & gentian mod tunggal, the most fundamental differences are the
size of the fiber’s core and the associated attenuation or loss and bandwidth of the fiber. The smaller the
core diameter, semakin tinggi lebar jalur gentian dan semakin rendah pengecilan (kehilangan dalam dB setiap kilometer).
Pengecilan gentian dan lebar jalur juga bergantung pada panjang gelombang.
Singlemode was for high-speed long-distance transmission and multimode (in either the 50 µm or 62.5 µm
core diameters) was used for lower speed short distance applications. Multimode 50 µm fiber had a lower
cost and higher modal bandwidth than multimode 62.5 µm core fiber. Bandwidth is a measurement of the
data-carrying capacity of the fiber. A higher bandwidth fiber carries more data. See table below.
| Jenis Gentian | Maks. Pelemahan (dB/km) | Pelancaran Min.Overfill Lebar jalur (Mhz.km) | Min.Gigabit Ethernet Jarak Pautan (m) | ||||||
| Gigabit | 10Gigabit | ||||||||
| 850nm | 1300nm | 1310nm | 1550nm | 850nm | 1300nm | 850nm | 1300nm | 850nnm | |
| OM1 62.5/125µm | ≤2.7 | ≤0.6 | – | – | ≥500 | ≥600 | 275 | 550 | – |
| OM2 50/125µm | ≤2.3 | ≤0.6 | – | – | ≥500 | ≥500 | 750 | 600 | 150 |
| OM3 50/125µm | ≤2.3 | ≤0.6 | – | – | ≥1500 | ≥500 | 1000 | 600 | 300 |
| OM4 50/125µm | ≤2.3 | ≤0.6 | – | – | ≥3500 | ≥500 | 1100 | 600 | 550 |
| G652D 9/125µm | – | – | ≤0.30 | ≤0.18 | – | – | – | – | – |
| G657A 9/125µm | – | – | ≤0.35 | ≤0.21 | – | – | – | – | – |
ANSI/TIA/EIA-598-B Standard Serat Cbau Code
| Nombor Gentian | Serat Warna | Nombor Gentian | Serat Warna |
| Serat 1 | Biru | Serat 7 | merah |
| Serat 2 | Jingga | Serat 8 | Hitam |
| Serat 3 | hijau | Serat 9 | Kuning |
| Serat 4 | coklat | Serat 10 | Ungu |
| Serat 5 | Kelabu | Serat 11 | Merah jambu |
| Serat 6 | putih | Serat 12 | Aqua |
| Serat 13 dan lebih tinggi Kod warna diulang dengan tambahan jalur hitam atau sempang | |||
| Catatan: Warna Tiub Fiber akan diikuti dengan susunan yang sama. | |||
