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CHAPTER 9: CABLES
9.8 FIBER STANDARDS
The International Telecommunication Union (ITU-T) has standardized various fiber types for data networks. These are summarized in the
following table.
TABLE 9-3. 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 Fiber:
Single-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 Fiber:
Single-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 Fiber:
Single-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.
