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We experimentally demonstrate ultra-long-haul multi-core fiber transmission using a cladding pumped 7-core erbium-doped fiber amplifier. We confirm 76 × 128-Gbit/s Nyquist-pulse-shaped DP-QPSK signals are successfully transmitted over 4,200-km 7-core fiber.
We optimize 7-multicore erbium-doped fiber amplifier for DWDM systems. Each core of MC-EDF is pumped by LD individually with bundled fan-in. The MC-EDFA has gain of 15 dB and NF of 6 dB within C-band.
Amplification characteristics of MC-EDFA are reviewed. Applicability to future network is evaluated by utilizing core-pumping configuration. In addition, cladding-pumping configuration, which has possibilities for reducing power consumption and downsizing, is demonstrated.
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