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| Above: Image of bi-directional O-band coherent DWDM transmission system. Center: Composition of O-band Bismuth-doped optical fiber amplifier. Below: A 12-core optical fiber (right) with 12 cores densely arranged in the same standard 250 μm coating outer diameter as conventional optical fiber (left). Credits: KDDI and KDDI Research; Furukawa Electric and OFS; and Sumitomo Electric. |
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