Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 38: Poster IV

Q 38.15: Poster

Mittwoch, 13. März 2024, 17:00–19:00, KG I Foyer

Fabricating high-finesse fiber Fabry-Perot cavities for quantum simulation — •Constantin Grave, Isabelle Safa, Marvin Holten, and Julian Leonard — TU Wien - Atominstitut, Stadionallee 2, 1020 Wien, Österreich

Fiber Fabry-Perot cavities (FFPCs) are used in a wide spectrum of technical and scientific applications ranging from cavity quantum electrodynamics and fiber-coupled single-photon sources to new scanning microscopy techniques. We realize a highly automated fabrication facility to manufacture curved mirrors on the end-facets of optical fibers. While the curvature is shaped with a CO2 laser, the coating for the reflectivity is applied externally. In our setup a Mireau objective using white light interferometry is included, allowing us to measure the shape of the mirror during production and enabling iterative optimisation of the geometry. We expect this approach to result in small yet open FFPCs with favorable scaling properties, small mode volumes as well as high finesses. This combination of features is advantageous for the construction of compact and robust quantum-enabled devices like the currently build setup of our group, that uses an tweezer-loaded array of neutral atoms inside a FFPC.

Keywords: Fiber cavity; High finesse; White light interferometry