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Volume 12
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Article

High-Bandwidth Silicon Strip Waveguide-Based Electro-Optical Modulator in Series Push–Pull Configuration

by
Ahmed Shariful Alam
*,
Sherif Nasif
and
J. Stewart Aitchison
Department of Electrical & Computer Engineering, University of Toronto, Toronto, ON M5S 1A4, Canada
*
Author to whom correspondence should be addressed.
Photonics 2025, 12(5), 484; https://doi.org/10.3390/photonics12050484
Submission received: 2 April 2025 / Revised: 5 May 2025 / Accepted: 9 May 2025 / Published: 14 May 2025
(This article belongs to the Special Issue Emerging Trends in On-Chip Photonic Integration Technologies)
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Abstract

Silicon modulators operating at high speeds are crucial for contemporary optical communication systems; nevertheless, their performance is limited by the resistance–capacitance (RC) time constant. This research introduces a modulator based on a silicon strip waveguide, also known as a capacitively coupled silicon modulator (CC-Si), arranged in a series push–pull (SPP) configuration, which effectively addresses the constraints imposed by the RC time constant. The modulator demonstrates a consistent electro-optic (EO) response that extends to 68 GHz. Furthermore, it achieves a phase shift of 0.022 radians for a C-band optical wave when exposed to a 15 GHz radio frequency (RF) modulation signal with an amplitude of 2.45 V.
Keywords: capacitive coupling; bandwidth enhancement; silicon modulators; series push–pull configuration capacitive coupling; bandwidth enhancement; silicon modulators; series push–pull configuration

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MDPI and ACS Style

Alam, A.S.; Nasif, S.; Aitchison, J.S. High-Bandwidth Silicon Strip Waveguide-Based Electro-Optical Modulator in Series Push–Pull Configuration. Photonics 2025, 12, 484. https://doi.org/10.3390/photonics12050484

AMA Style

Alam AS, Nasif S, Aitchison JS. High-Bandwidth Silicon Strip Waveguide-Based Electro-Optical Modulator in Series Push–Pull Configuration. Photonics. 2025; 12(5):484. https://doi.org/10.3390/photonics12050484

Chicago/Turabian Style

Alam, Ahmed Shariful, Sherif Nasif, and J. Stewart Aitchison. 2025. "High-Bandwidth Silicon Strip Waveguide-Based Electro-Optical Modulator in Series Push–Pull Configuration" Photonics 12, no. 5: 484. https://doi.org/10.3390/photonics12050484

APA Style

Alam, A. S., Nasif, S., & Aitchison, J. S. (2025). High-Bandwidth Silicon Strip Waveguide-Based Electro-Optical Modulator in Series Push–Pull Configuration. Photonics, 12(5), 484. https://doi.org/10.3390/photonics12050484

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