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Q: Fachverband Quantenoptik und Photonik

Q 60: Quantum Effects (Cavity QED)

Q 60.4: Vortrag

Freitag, 13. März 2020, 11:45–12:00, f442

Monolithic Fiber Fabry-Perot Cavities with improved mode matching. — •Madhavakkannan Saravanan, Carlos Saavedra Salazar, Deepak Pandey, Hannes Pfeifer, Wolfgang Alt, and Dieter Meschede — Institute of Applied Physics, University of Bonn, Germany

Fiber Fabry-Perot cavities (FFPCs) are an established tool to optically interface atomic, molecular or solid-state systems. However, the stability and, in the case of long cavities, the mode matching of the guided fiber mode to the FFPCs remain challenging.

To overcome these limitations we use a monolithic FFPC design that combines high passive stability with tunability across a free spectral range. Improving the mode matching to a guided fiber mode can be accomplished using stacks of different fiber types such as single-mode, multi-mode and graded-index fibers [1]. We show how the fabrication of these assemblies using splicing of fibers with different material characteristics as well as cleaving with micrometer precision can be accomplished. The quality of fabricated assemblies is assessed by microscope-imaging of the out-coupled fiber mode.

The combination of these techniques has the potential to extend the range of applications for FFPCs to e.g. frequency filters, cavity ring-down spectroscopy or cavity-QED with ions.

[1] Gulati et al., Sci Rep 7, 5556, (2017).