Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 38: Poster IV
Q 38.32: Poster
Wednesday, March 13, 2024, 17:00–19:00, KG I Foyer
Processing of Tapered Fibres with Concave End Facets for Quantum Networks — •Lasse Jens Irrgang1, Georgia Eirini Mandopoulou1,3, Timo Eikelmann1, Mara Brinkmann1, Tuncay Ulas1, Sunil Kumar Mahato1,2, Donika Imeri1,2, Rikhav Shah1, and Ralf Riedinger1,2 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany — 3Department of Physics, Harvard University, Cambridge, MA 02138, USA
A key aspect in the creation of quantum networks for quantum communication based on trapped ions or vacancy centres is the interface between photons travelling in fibres and the qubit. For an efficient connection, fibres need to be processed to fit the application. We present a set-up based on laser ablation which allows for precise machining of fibres and presents an alternative to the current technique of etching with hydrofluoric acid. Specifically, we produce concave end facets and tapered profiles with desired properties. The applications include low noise microcavities in QED-based interfaces to trapped ions or Rydberg atoms. Fibres exhibiting only the tapered profile can also be used for a connection to silicon vacancy centres in diamond.
Keywords: Fibre; Cavity-QED; Quantum Communication; Colour Centre; Trapped Ions