We propose and demonstrate a 100 Gbit/s silicon photonic (SiPh) coherent receiver (Rx) with advanced digital signal processing (DSP) for dual-polarization quadrature-phase-shift-keying (DP-QPSK) transmission. It employs integrated 2D polarization-splitting grating couplers (2D-GCs), modified hybrid mixers and high speed silicon-germanium (SiGe) photodiodes (PDs). The 2D-GC replaced the polarization beam splitters and rotators needed in traditional coherent Rx. Moreover, the SiGe PD has the bandwidth >50 GHz.

中文翻译：

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使用 2D 光栅耦合硅基接收器的 DP-QPSK 相干检测

我们提出并演示了一种 100 Gbit/s 硅光子 (SiPh) 相干接收器 (Rx)，具有用于双极化正交相移键控 (DP-QPSK) 传输的高级数字信号处理 (DSP)。它采用集成的 2D 偏振分离光栅耦合器 (2D-GC)、改进的混合混频器和高速硅锗 (SiGe) 光电二极管 (PD)。2D-GC 取代了传统相干 Rx 所需的偏振分束器和旋转器。此外，SiGe PD 具有 >50 GHz 的带宽。