Since 2006 and the renewed interest in coherent detection associated with digital signal processing, the transported bit rate per wavelength has been increased from 40 Gb/s up to 1 Tb/s. I will present the recent advancements in high bit rate optical communication over fiber optics. Signal processing for spectrally efficient coherent systems will be presented, including phase estimation, timing estimation, forward error correction coding and nonlinear mitigation techniques which are particularly challenging for high order constellations. I will also present recent breakthrough obtained with ultrawide bandwidth semiconductor optical amplifier, as well as solutions to drastically increase the throughput over multimode fibers.
Gabriel CHARLET
Nokia Bell Labs
Paris-Saclay
F-91620 Nozay
https://www.bell-labs.com/
