研究目的
Investigating the use of optical-domain equalization in hybrid-integrated silicon photonic links to achieve high-speed transmission without forward-error correction codes.
研究成果
The combination of optical-domain FFE and hybrid-integration of high-performance semiconductor platforms enables a SiGe-driven silicon photonic link capable of operating without FEC at ≥ 50 Gb/s. This approach shifts the paradigm from a bandwidth-limited to a margin-limited regime, offering a promising path for low latency interconnects.
研究不足
The proof-of-concept demonstration is limited by the granularity with 6 segments, and the power consumption could be further optimized. The optical coupling loss varies from sample to sample, indicating a need for improved manufacturable optical packaging approaches.
1：Experimental Design and Method Selection:
The experiment leverages optical-domain feed-forward equalization (FFE) in a hybrid-integrated silicon photonic link. The design includes a segmented-electrode Mach-Zehnder modulator (SE-MZM) and a Ge photodetector for high bandwidth and integration potential.
2：Sample Selection and Data Sources:
The components are fabricated in GlobalFoundries' 130nm BiCMOS and 90nm photonics-enabled CMOS processes. The SE-MZM has six segments in each arm, and the photodetector is an experimental non-standard device.
3：List of Experimental Equipment and Materials:
The setup includes a pattern generator, polarization controller, variable optical attenuator, mechanical switch, power meter, sampling oscilloscope, and BER tester.
4：Experimental Procedures and Operational Workflow:
The transmitter is driven using optical FFE at speeds of 50 and 60 Gb/s. The receiver performance is evaluated through eye diagrams and BER measurements.
5：Data Analysis Methods:
The performance is analyzed based on BER sensitivity and timing margin measurements, with eye diagrams recorded at the receiver output.
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