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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.44: Poster
Donnerstag, 11. September 2025, 16:30–18:30, ZHG Foyer 1. OG
Development of a photon-pair source for quantum repeaters — •Henning Mollenhauer1, 2, Helen Chrzanowski3, Leon Meßner2, and Janik Wolters1,2 — 1DLR Berlin-Adlershof, Berlin — 2TU Berlin — 3HU Berlin
We are reporting on the development of a photon-pair source for signal and idler photons at 894nm and 1550nm. The underlying process is spontaneous parametric down-conversion (SPDC) inside a periodically poled KTP crystal. To achieve spectrally pure and narrow-band characteristics for signal and idler photons our ppKTP crystal is designed as a monolithic cavity [1]. Pulsed pump light at 567nm for the SPDC process is produced in sum frequency generation from the target wavelengths. For the future we plan to interface our photon source with a single-photon quantum memory [2], to build a demonstrator of a quantum repeater. [1] Mottola et al. (2020) [2] Jutisz et al. (2024)
Keywords: SPDC