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Low-Cost 400 Gbps DR4 Silicon Photonics Transmitter for Short-Reach Datacenter Application.

Haike Zhu1, Sean Anderson1, Nick Karfelt2

  • 1MACOM Technology Solutions Inc., Allentown, PA 18195, USA.

Nanomaterials (Basel, Switzerland)
|August 27, 2021
PubMed
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Researchers developed a silicon photonic transmitter engine for fast, affordable intra-datacenter links. The design achieves over 40 GHz bandwidth and demonstrates clear signals for optical transceiver modules.

Area of Science:

  • Photonics
  • Electrical Engineering
  • Computer Engineering

Background:

  • Intra-datacenter connections require high-speed, low-cost solutions.
  • Optical transceiver modules are key components for data transmission.

Purpose of the Study:

  • To design and test an integrated silicon photonic circuit for intra-datacenter transmitter engines.
  • To meet the QSFP-DD Form Factor requirements for optical transceiver modules.

Main Methods:

  • Designed and tested a high-speed silicon modulator.
  • Integrated the transmitter engine onto a test board.
  • Injected a 53.125 Gbaud Pulse Amplitude Modulation with 4 levels (PAM4) signal.

Main Results:

  • The silicon modulator achieved a 3-dB electro-optic (EO) bandwidth exceeding 40 GHz and an extinction ratio (ER) greater than 5 dB.
Keywords:
400GBASE-DR4PAM-4QSFP-DDdatacomintegrated optics devicesoptical modulatorsilicon photonicstransmitter

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  • Clear eye patterns were observed at the receiver for all four lanes.
  • The transmitter error rate (TDECQ) was approximately 3 dB.

    • Conclusions:

    • The developed silicon photonic transmitter engine is suitable for high-speed intra-datacenter applications.
    • The design meets the performance requirements for QSFP-DD optical transceiver modules.
    • This technology enables efficient and cost-effective data transmission within datacenters.