Feasibility Demonstration of 0.8-bit/s/Hz Spectral-Efficiency at 160 Gb/s Using Phase-Correlated RZ Signal with Vestigial Side Band Filtering

We study the feasibility of achieving 0.8-bit/s/Hz spectral efficiency at 160 Gb/s. We generate phase-correlated RZ signal by utilizing the Kerr shutter effect in a highly nonlinear fiber. The 160-Gb/s RZ signal is then filtered with a 200-GHz bandwidth filter. Error-free operation is obtained by properly shifting the filter central wavelength. We also investigate the filtering performance of phase-uncorrelated signal generated by conventional OTDM means.