Long-haul networks are required to transmit massive amounts of information to meet the world’s heavy and growing bandwidth demands. In current terrestrial networks, a long-haul system typically ranges from 300 to 2,500 kilometers and connects major cities. In addition, these long-haul systems have largely migrated to 10 Gb/s based dense wavelength division multiplexed (DWDM) systems with 32 channels or more. These distances, bit rates, and capacities require an optical fiber that can manage both the large amounts of dispersion that will accumulate and the non-linear penalties that can limit reach and performance.
In addition, the optical fiber must help carriers drive down costs by increasing the distance between optical amplifiers and the overall transparent reach. Finally, the optical fiber must support future system technologies including the eventual migration to 40 Gb/s based systems and highly spectrally efficient systems.
Corning is connecting cities all over the world with Corning® LEAF® optical fiber, a fiber specifically designed for high data rate metropolitan and long-haul applications.
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Corning’s SMF-28® ULL fiber is the lowest loss and lowest PMD terrestrial optical fiber available. Combined, these features provide spare network margin that can be leveraged to extend span lengths, skip amplification sites, upgrade to faster bit rates or lengthen unregenerated reach.
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