Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Poster III

Q 37.48: Poster

Wednesday, March 13, 2024, 17:00–19:00, Tent B

PIC based Entangled Photon Pair Source using Spontaneous Four-Wave-Mixing and Pulsed PDH-Locking — •Maximilian Mengler, Jakob Kaltwasser, Erik Fitzke, and Thomas Walther — TU Darmstadt, Institute for Applied Physics, 64289 Darmstadt

For many applications, such as quantum key distribution (QKD), entangled photon pairs are a necessity. We use the process of spontaneous four-wave-mixing to create these pairs within microring resonators on silicon nitride photonic integrated circuits (PICs). Results regarding, e.g. pair generation rate and coincidental-over-accidental ratio obtained from two distinct PICs with different layouts, specifications, and waveguide geometries will be presented and compared. As the PICs are intended as sources for our time-bin based QKD-system, the PDH technique used to lock the microring resonators to the pump light was adapted for operation with pulsed light.

Keywords: PIC; Photon Pair Source; Ring Resonators