Unprecedented Transmission Speeds – Scientists Develop New Quantum Key Distribution System — Integrated photonics-based q |
Researchers have developed a quantum key distribution system based on silicon photonics that can transmit secure keys at unprecedented speeds. The QKD transmitter combines a photonic and electric integrated circuit with an external diode laser.
The silica-based QKD receiver shown consists of a photonic integrated circuit and two external single-photon detectors. Credit: Simone Atzeni, CNR-IFN, researchers led by the University of Geneva’s Hugo Zbinden describe their new QKD system, in which all components are integrated onto chips except the laser and detectors. This comes with many advantages such as compactness, low cost, and ease of mass production.
QKD systems use a transmitter to send the encoded photons and a receiver to detect them. In the new work, the University of Geneva researchers collaborated with silicon photonics company Sicoya GmbH in Berlin, Germany, and quantum cybersecurity company ID Quantique in Geneva to develop a silicon photonics transmitter that combines a photonic integrated circuit with an external diode laser.
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