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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics II

Q 42.23: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Atrium Informatik

Production and Assembly of a Compact Fiber-Cavity System for CQED with Neutral Atoms — •Lukas Ahlheit, David Röser, Jose Gallego, Deepak Pandey, Eduardo Urunuela, Wolfgang Alt, and Dieter Meschede — Institute for Applied Physics, University of Bonn, Germany

Fiber-cavity systems are excellent interfaces to study light-matter interactions due to their small mode volume and ease of integration. Here we demonstrate the production and assembly of a fiber-cavity system for CQED with Rb atoms [1]. The small mode volume guarantees strong coupling even in the presence of large extraction rates making it a promising platform for a high bandwidth photon-matter interface.

Trapping atoms in a UHV environment requires the integration of high NA lenses to form an optical lattice in the fiber-cavity. The system*s performance thereby relies on their accurate alignment, which is achieved by using a monolithic mount. The cavity mirrors are fabricated directly onto the fiber end facets by CO2 laser ablation and subsequent high reflection coating. Fiber cavity designs with graded-index and multi-mode fibers for enhanced mode matching will be implemented in the near future [2].

[1] J Gallego et al, Appl. Phys. B 122:47, (2016)

doi: 10.1007/s00340-015-6281-z

[2] G Gulati et al, Scientific Reports 7, 5556, (2017)

doi: 0.1038/s41598-017-05729-8