Peak-to-average Power Ratio Constrained Digital Pre-emphasis for Short-reach Coherent Systems with Transmitter Bandwidth Limitation

A peak-to-average power ratio constrained digital pre-emphasis method for short-reach coherent systems is proposed and experimentally validated. In a 96-GBaud 32QAM transmission experiment, the proposed method improves the transmitter output power by ~0.5 dB without receiver sensitivity degradation compared with the conventional partial pre-emphasis method.