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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.51: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II

Advancements in the fabrication of high finesse fibre Fabry-Pérot cavities — •Leander Hohmann, Natalie Thau, Christian Deutsch, Jérôme Estève, and Jakob Reichel — ENS - Ecole Normale Supérieure

We present the recent progress in realisation of fibre-based Fabry-Pérot cavities. These cavities are formed by concave, ultra-low roughness mirror surfaces fabricated with CO₂ laser pulses directly on the end facets of optical fibres and coated with a high-performance dielectric coating. These fibre Fabry-Pérot cavities (FFPCs) combine very small size, high finesse F > 130 000, small waist and mode volume, and good mode matching between the fibre and cavity modes. Due to this attractive combination of features, FFPCs are used in an increasing number of experiments in cavity quantum electrodynamics as well as in a wide range of other applications where they provide coupling to single atoms, molecules and ions. We present our current progress in FFPC fabrication which is aimed at further reducing absorption and scattering loss, improving precision and reproducibility of the laser machining process, and enhanced control of the cavity birefringence caused by the dielectric mirror coating.