Yanjun Zhu

Nonlinear Phase Noise Mitigation With Soft-Differential Decoding and Nonredundant Error Correction for Hybrid 10G/100G Transmission

We report experimental results of 112-Gb/s po larization-division-multiplexed return-to-zero quaternary phase-shift-keying (PDM-RZ-QPSK) transmission over dis persion-managed 1200-km links embedded between 10.7-GBaud on-off keying nonreturn-to-zero (OOK-NRZ) neighbors. Taking into account implementation constraints for equalization and synchronization of the digital signal processing (DSP) by means of processing delay and parallelization, the performances without differential decoding, with hard-differential decoding, and with soft-differential decoding are evaluated. The combination of soft-differential decoding with nonredundant error correction is identified to provide the best mitigation of cross-phase modulation (XPM)-induced nonlinear phase noise.

Experimental comparison of terabit nyquist superchannel transmissions based on high and low baud rates

We report experimental results comparing two-types-of terabit Nyquist-pulse-shaped superchannel transmissions. A 50-subcarrier low-baud-rate system with potential of significant DSP simplification has shown similar transmission performance compared with a 10-subcarrier high-baud-rate system.

Spectrally-efficient single-carrier 400G transmission enabled by probabilistic shaping

We report experimental results of Probabilistically Shaped 64QAM (PS-64QAM) Single-Carrier 400G transmission over SSMF, in a 50 GHz wavelength grid. Up to 300% reach enhancement over regular 64QAM is achieved, thanks to probabilistic shaping.

Terabit Superchannel Optical Transmission Based on Low-Baud-Rate Subcarrier Nyquist WDM

We discuss terabit superchannel transmission exploring low-baud-rate Nyquist pulse shaped subcarriers. This technique can enable the transmission with much smaller propagation penalty, while having the potential of significant reduction of power consumption.