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OPTICS EXPRESS
Volume 20, Issue 2, Pages 706-711Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.000706
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We demonstrate 2688-km multi-span transmission using wavelength-division multiplexing (WDM) of ten 50-GHz spaced 128-Gb/s PDM-QPSK signals, space-division multiplexed (SDM) in a low-crosstalk 76.8-km seven-core fiber, achieving a record net aggregate per-fiber-spectral-efficiency-distance product of 40,320 km.b/s/Hz. The demonstration was enabled by a novel core-to-core signal rotation scheme implemented in a 7-fold, synchronized recirculating loop apparatus. (C)2012 Optical Society of America
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