100G Superchannel Transmission Using $4\times 28$ Gb/s Subcarriers on a 25-GHz Grid

We demonstrate the transmission of a 100G superchannel, composed of 4 × 28-Gb/s duobinary subcarriers placed on a 25-GHz grid, over 580 km of SSMF with three 25-GHz reconfigurable add-drop multiplexer nodes. The directdetect 100G superchannel has moderate optical signal to noise ratio requirements and significant tolerance to the different optical impairments. The robustness, low-power consumption, cost effectiveness, and spectral efficiency of this 100G system makes it a very strong candidate for today's datacenterand metro-networks.