Chip (Dec 2025)

Silicon photonic transmitter and receiver for hybrid multiplexing systems

  • Yingying Peng,
  • Hengzhen Cao,
  • Jin Xie,
  • Weike Zhao,
  • Yuluan Xiang,
  • Dajian Liu,
  • Zejie Yu,
  • Daoxin Dai

DOI
https://doi.org/10.1016/j.chip.2025.100148
Journal volume & issue
Vol. 4, no. 4
p. 100148

Abstract

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High-capacity on-chip optical transmitters and receivers are crucial for data transmissions. Currently, advanced multiplexing technologies, including wavelength division multiplexing (WDM), mode-division multiplexing (MDM), and polarization-division-multiplexing (PDM) have been developed to greatly enhance the link capacity. In this paper, monolithically integrated silicon photonic transmitter and receiver with an ultra-high-capacity density of 37.0 Tbps/cm2 were proposed and demonstrated by introducing hybrid multiplexers and arrayed modulators/photodetectors. For the demonstrated transmitter/receiver chips, there are five wavelength channels and four mode channels with dual polarizations involved, while all these channels have low excess losses of 1 to 2 dB and low crosstalk less than −15 dB. Finally, all 20 channels are able to work with 50 Gbps on–off keying (OOK) signals per channel, achieving a total capacity of 1T-bps within an ultra-compact chip size of 0.032 cm2 for transmitters and 0.022 cm2 for receivers.

Keywords