Fiber Types
This section discusses various MMF and SMF types currently used for premise, metro, aerial, submarine, and long-haul applications. The International Telecommunication Union (ITU-T), which is a global standardization body for telecommunication systems and vendors, has standardized various fiber types. These include the 50/125-μm graded index fiber (G.651), Nondispersion-shifted fiber (G.652), dispersion-shifted fiber (G.653), 1550-nm loss-minimized fiber (G.654), and NZDSF (G.655).
Multimode Fiber with a 50-Micron Core (ITU-T G.651)
The ITU-T G.651 is an MMF with a 50-μm nominal core diameter and a 125-μm nominal cladding diameter with a graded refractive index. The attenuation parameter for G.651 fiber is typically 0.8 dB/km at 1310 ...
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