B-5
Fiber Standards
B
2. Reduce the number of connectors used in the link.
3. Reconnect some of the connectors in the link.
Fiber Standards
The International Telecommunication Union (ITU-T) has standardized various fiber
types for data networks. These are summarized in the following table.
Table B-3 Fiber Standards
ITU-T
Standard
Description Application
G.651 Multimode Fiber
50/125-micron core
Short-reach connections in the
1300-nm or 850-nm band.
G.652 Non-Dispersion-Shifted
FiberSingle-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for operation in the
1310-nm band. but can also be used
in the 1550-nm band.
G.652.C Low Water Peak
Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for wavelength-division
multiplexing (WDM) transmission
across wavelengths from 1285 to
1625 nm. The zero dispersion
wavelength is in the 1310-nm region.
G.653 Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for operation in the region
from 1500 to 1600-nm.
G.654 1550-nm Loss-Minimized
FiberSingle-mode, 9/125-micron core
Extended long-haul applications.
Optimized for high-power
transmission in the 1500 to 1600-nm
region, with low loss in the 1550-nm
band.
G.655 Non-Zero Dispersion-Shifted
FiberSingle-mode, 9/125-micron core
Extended long-haul applications.
Optimized for high-power dense
wavelength-division multiplexing
(DWDM) operation in the region from
1500 to 1600-nm.
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