Crosstalk suppression for high-density traveling-wave MZM array based on static and dynamic combined analysis and circuit-level designs

Electrical crosstalk severely degrades the performance of Mach-Zehnder modulator (MZM) array. However, conventional crosstalk suppression techniques incur losses of large amounts of chip area for signal isolation, which becomes a bottleneck of high-density electronic-photonic integrated circuit. In...

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Veröffentlicht in:Optics express 2022-07, Vol.30 (15), p.27333-27345
Hauptverfasser: Ji, Pengfei, Lin, Wenmiao, Zhang, Wenjia, Xu, Shi, Luo, Zhang, Lai, Mingche, Wang, Qin, He, Weifeng
Format: Artikel
Sprache:eng
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Zusammenfassung:Electrical crosstalk severely degrades the performance of Mach-Zehnder modulator (MZM) array. However, conventional crosstalk suppression techniques incur losses of large amounts of chip area for signal isolation, which becomes a bottleneck of high-density electronic-photonic integrated circuit. In this paper, the electrical crosstalk of Traveling-Wave MZM array is originally analyzed with static and dynamic combined crosstalk coefficients. Circuit-level suppression techniques of differential dual-drive electrode schemes with tightly coupled electrode pairs and a virtual ground structure with full-matching termination circuit are investigated for noise-removing effects. Simulation results show that the dynamic electrical crosstalk coefficient between two adjacent modulators is reduced to below 1.5%, which is five times lower than the baseline. The electro-optical link measurements show that the BER is significantly reduced from 1E-3 to 1E-12 for multi-channel operation, which confirms the effectiveness of the crosstalk suppression techniques.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.462396