Monolithic silicon photonic circuits enable 112-Gb/s PDM-QPSK transmission over 2560-km SSMF

Using silicon photonic integrated circuits (PICs), we demonstrate the generation, transmission over 2560-km standard single-mode fiber, and detection of 112-Gb/s polarization-division-multiplexed quadrature phase-shift keying signals. These silicon-based PICs promise compact, low-power-consumption, and low-cost coherent transceivers.