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arXiv · 2412.07627

Terabit-class coherent communications enabled by an integrated photonics erbium doped amplifier

Di Che·Stefano Grillanda·Yang Liu·Zheru Qiu·Xinru Ji·Gregory Raybon·Xi Chen·Kwangwoong Kim·Tobias J. Kippenberg·Andrea Blanco-Redondo
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Abstract

Coherent technologies have revolutionized optical communications, driving the capacity per fiber to multi-terabit per second (Tb/s) in combination with wavelength division multiplexing (WDM). With an ever-increasing deployment density of coherent systems, the demand for highly integrated WDM coherent transceivers has been rising. While tremendous progress has been made on silicon photonics compatible high-speed modulation and photodetection on chip, a solution for monolithically integrable amplifier with high gain and output power remains a challenge. Recently, an erbium doped waveguide amplifier based on ultra-low loss silicon nitride waveguides has demonstrated gain and output power levels potentially suitable for Terabit class coherent communications. Here, we demonstrate a WDM coherent system enabled by this integrated photonic amplification solution. The system uses the waveguide amplifier as a booster amplifier of 16 WDM signals each carrying a net data rate of 1.6 Tb/s, achieving 25.6-Tb/s net capacity over 81-km fiber transmission. Our results highlight a fully integrated solution for highly parallel coherent transceivers including amplification, that has the potential to transform future optical communications.

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Di Che, Stefano Grillanda, Yang Liu, Zheru Qiu, Xinru Ji, Gregory Raybon, Xi Chen, Kwangwoong Kim, Tobias J. Kippenberg, Andrea Blanco-Redondo. 2024-12-10. Terabit-class coherent communications enabled by an integrated photonics erbium doped amplifier. https://arxiv.org/abs/2412.07627

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