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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.61: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster

Fabrication and utilization of fiber-based Fabry-Perot resonators in ultra-thin fiber applications — •Andreas Jöckel, Christian Wuttke, and Arno Rauschenbeutel — Abteilung QUANTUM, Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz

We present experimental results on the fabrication and utilization of fiber-based Fabry-Perot resonators. The Fabry-Perot fiber resonators are realized by applying dielectric mirrors in the form of so-called transfer coatings to the end facets of standard optical fibers. With these resonators we observe finesses up to 130 in agreement with the mirror reflectivity of about 98%. An ultra-thin fiber part can be integrated into these resonators by flame heating and elongating the fiber yielding waist diameters down to 500 nm and finesses of 50. These resonators can be used to precisely characterize the loss of the tapered section as well as to enhance the sensitivity of spectroscopic techniques which rely on the ultra-thin fiber’s evanescent field. In addition, it is possible to create pure higher order beams by using a multi-mode fiber resonator as a transversal mode filter. These higher order beams are useful in various applications including a new type of atom trap based on ultra-thin fibers [1].

Financial support by the Volkswagen Foundation and the ESF is gratefully acknowledged.

[1] G. Sagué, A. Baade, and A. Rauschenbeutel, New J. Phys. 10, 113008 (2008).