Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 37: Poster III
Q 37.54: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent B
Photonic integrated circuits for phase-encoded prepare-and-measure QKD on a CubeSat — •Joost Vermeer1,2, Jonas Pudelko1,2, Kevin Günthner1,2, and Christoph Marquardt1,2 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany — 2Max Planck Institute for the Science of Light, Erlangen, Germany
In the past decade several projects have been started to develop satellite based quantum key distribution (QKD) systems and avoid the range limitations of fiber based QKD systems. The cost of these systems is for a large part determined by the size, weight and power of the satellite. With photonic integrated circuits (PICs) one can integrate many optical components on a single chip, which opens up the possibility to implement all the optical functions necessary for QKD with reduced size, weight and power requirements.
In this work, we will present our optical CubeSat payload for the QUBE-II mission. It will perform phase encoded prepare-and-measure QKD with weak coherent states using an Indium-Phosphide transmitter PIC. We discuss the requirements for this transmitter PIC and compare different PIC design approaches to investigate which one can best fulfill these requirements.
Keywords: Quantum key distribution; Photonic integrated circuits