DP-QPSK Coherent Detection Using 2D Grating Coupled Silicon Based Receiver

Ching Wei Peng, Chi Wai Chow*, Pin Cheng Kuo, Guan Hong Chen, Chien Hung Yeh, Jyehong Chen, Yinchieh Lai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number9291458
JournalIEEE Photonics Journal
Issue number1
StatePublished - Feb 2021


  • coherent detection
  • dual-polarization quadrature-phase-shift-keying (DP-QPSK)
  • Silicon photonic (SiPh)

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