Long Haul transmission systems operating at 400 Gb/s data rates will move from the lab to the field in the next few years to meet bandwidth demand that is increasing by 40% or more annually. The details of these systems are still being finalized but one concern is evident: network operators are nearing the capacity limit of standard single-mode fiber and will likely need to consider new types of optical fiber to support cost effective solutions at higher data rates. New optical fiber designs have been suggested to improve 400 Gb/s and higher speed system performance. In this paper the options are compared and it is shown why optimum large effective area G.654 fibers, such as OFS TeraWaveTM Fiber, will likely play an important role in the modern long haul network.|Long Haul transmission systems operating at 400 Gb/s data rates will move from the lab to the field in the next few years to meet bandwidth demand that is increasing by 40% or more annually. The details of these systems are still being finalized but one concern is evident: network operators are nearing the capacity limit of standard single-mode fiber and will likely need to consider new types of optical fiber to support cost effective solutions at higher data rates. New optical fiber designs have been suggested to improve 400 Gb/s and higher speed system performance. In this paper the options are compared and it is shown why optimum large effective area G.654 fibers, such as OFS TeraWaveTM Fiber, will likely play an important role in the modern long haul network.

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