Quasi-Real-Time High-Speed Coherent Sampling, Signal Processing, and Monitoring of 107-GBd PDM-QPSK Signals

We present a novel quasi-real-time coherent sampling approach that combines the high bandwidth of equivalent-time optical sampling with real-time signal processing and equalization algorithms. The technique is demonstrated on a record high-speed 107-GBd QPSK signal. OCIS codes: (060.2330) Fiber optics communications; (060.1660) Coherent communications