Abstract Optical coherent burst-mode transmission can offer not only flexibility but also efficiency of the network resource utilization in elastic optical networks. We propose a new digital signal processing (DSP) scheme of coherent burst reception with a training sequence (TS) to solve the convergence problem of equalization caused by the interaction between fast-changing transient frequency offset (TFO) and fiber chromatic dispersion (CD) compensation in optical burst (OB)-mode systems. The DSP scheme is demonstrated to perform well by the simulation and experimentation on 128 Gbps polarization multiplexing quadrature phase-shift keying (PM-QPSK) coherent systems. Thanks to the DSP scheme, a guard interval between two OBs is no longer needed, and the valid payload can be transmitted during TFO changing from wavelength tuning. The proposed DSP scheme can reduce the overhead by ∼ 73% for wavelength-tunable OB-mode coherent systems compared with using guard intervals, which significantly improves the spectral efficiency of burst-mode systems.

中文翻译：

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一种消除光突发模式相干系统中色散和瞬态频偏之间相互作用的新型 DSP 方案

摘要 光相干突发模式传输在弹性光网络中不仅可以提供灵活性，还可以提高网络资源利用效率。我们提出了一种带有训练序列 (TS) 的相干突发接收的新数字信号处理 (DSP) 方案，以解决由快速变化的瞬态频率偏移 (TFO) 和光纤色散 (CD) 之间的相互作用引起的均衡收敛问题光突发 (OB) 模式系统中的补偿。通过对 128 Gbps 偏振复用正交相移键控 (PM-QPSK) 相干系统的仿真和实验，证明 DSP 方案性能良好。由于采用了 DSP 方案，两个 OB 之间不再需要保护间隔，并且可以在 TFO 从波长调谐变化期间传输有效载荷。