Distributed Raman amplification, the technology used to increase the span reach in 10 and 40 Gb/s systems, may reduce overall system cost, in part by reducing the number of amplifiers in the network. This technology has been adapted in commercial systems and is now implemented in the field both in the United States, Europe and Asia.|Distributed Raman amplification, the technology used to increase the span reach in 10 and 40 Gb/s systems, may reduce overall system cost, in part by reducing the number of amplifiers in the network. This technology has been adapted in commercial systems and is now implemented in the field both in the United States, Europe and Asia.

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