Koichi Maeda

TL;DR: System feasibility for SDM transmission over 1200 km was demonstrated with 100 Gb/s PDM-QPSK signals and the EDFA uses shared free-space optics for pump beam combining and isolation, thus is SDM transparent and has some potential for cost reduction.

TL;DR: In this article, the authors demonstrate 140.7-Tbit/s, 7,326-km transmission of 7×201-channel 25GHz-spaced Super-Nyquist-WDM 100-Gbit/S optical signals using seven-core fiber and full C-band EDFAs, achieving a capacity-distance product of 1.03 Exabit/s·km.

TL;DR: Super-Nyquist-WDM transmission technique, where optical signals with duobinary-pulse shaping can be wavelength-multiplexed with frequency spacing of below baudrate, is shown, one of the first reports of high-capacity transmission experiments with capacity-distance product in excess of 1 Exabit/s · km.

TL;DR: The first 7-core multicore erbium-doped fiber amplified (MC-EDFA) transmission of 40 x 128-Gbit/s PDM-QPSK signals over 6,160-km 7- core multicore fiber (MCF) is demonstrated and the feasibility of MC-ED FA repeatered systems for trans-oceanic transmission is confirmed.

TL;DR: In this article, a world record capacity of 118.5 Tbit/s transmission through optical fiber with a 125 micron cladding diameter was achieved using a low loss and 316 km-long full space division multiplexing link incorporating multiple vendor technologies.