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Q: Fachverband Quantenoptik und Photonik

Q 44: Quantum Effects (Cavity QED)

Q 44.3: Vortrag

Mittwoch, 7. März 2018, 14:45–15:00, K 1.013

A Versatile Production Facility for Fiber-Based Mirrors — •Michael Kubista, Deepak Pandey, Wolfgang Alt, and Dieter Meschede — Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, 53115 Bonn

We report on a production facility for creating miniaturized fiber-based Fabry-Perot cavities, which have numerous applications in quantum information technology. A CO2 laser at 9.3 µm is used to produce mirror surfaces on fiber end facets using laser ablation [1], taking advantage of the higher absorption of silica glass at this wavelength [2]. Beam shaping and polarization control are employed to reduce mirror ellipticity. To reconstruct the profile of the mirror surfaces, a high-resolution in-line Mirau interferometer has been built. Further steps will include the implementation of a multi-shot technique to create larger mirrors [3], and the use of GRIN-lenses to improve mode matching efficiency [4]. These versatile techniques will enable us to produce cavities for a wide range of applications such as quantum communication, surface analysis, and opto-mechanical devices.

[1] D. Hunger, T. Steinmetz, Y. Colombe, C. Deutsch, T. W. Hänsch, and J. Reichel, N. J. Phys. 12, 065038 (2010) [2] M. Uphoff, M. Brekenfeld, G. Rempe, S. Ritter, N. J. Phys. 17, 013053 (2015) [3] K. Ott, S. Garcia, R. Kohlhaas, K. Schüppert, P. Rosenbusch, R. Long, and J. Reichel, 9839-9853 (2016) [4] G. Gulati, H. Takahashi, N. Podoliak, P. Horak, and M. Keller, Scientific Reports 7, 5556 (2017)