Integrated Silicon Photonic Transmitter for Polarization-Encoded Quantum Key Distribution

Abstract

We present a silicon optical transmitter for polarization-encoded quantum key distribution (QKD). The chip was fabricated in a standard silicon photonic foundry process and integrated a pulse generator, intensity modulator, variable optical attenuator, and polarization modulator in a 1.3 mm $\times$ 3 mm die area. The devices in the photonic circuit meet the requirements for QKD. The transmitter was used in a proof-of-concept demonstration of the BB84 QKD protocol over a 5 km long fiber link.

arXiv comment6 pages, 15 figures

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Cited by in corpus (3)

• Practical challenges in quantum key distribution
• A Modulator-Free Quantum Key Distribution Transmitter Chip
• Integrated Silicon Photonics for High-Speed Quantum Key Distribution