Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics IV
Q 58.20: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Long high finesse fiber Fabry-Pérot resonators — Konstantin Ott1,2, Sébastien Garcia1, Francesco Ferri1, •Torben Pöpplau1, Ralf Kohlhaas1, Klemens Schüppert3, Romain Long1, and Jakob Reichel1 — 1Laboratoire Kastler Brossel, ENS/CNRS/UPMC, Paris (France) — 2LNE-SYRTE, Observatoire de Paris/CNRS/UPMC, Paris (France) — 3Institute for Experimental Physics, University Innsbruck, Austria
We present the realization of millimeter-long fiber coupled open Fabry-Pérot resonators with a finesse of 46.000. Deterioration of the finesse with increasing resonator length observed in previous experiments could be suppressed by advances in the CO2 laser-based fabrication process of the fiber micro mirrors. In this way, resonator lengths up to 1.4 mm could be realized, corresponding to a free spectral range of 107 GHz and linewidths of 2.2 MHz.
Fiber-based micro-cavities are of great use in experimental quantum information science, as they have many application benefits. The reduced apparatus size and direct fiber coupling lead to an increased stability. Beyond concave mirror structures, the novel multi-pulse laser fabrication technique further allows to enlarge the range of accessible structures, including asymmetric mirror profiles, convex shapes on fiber tips and on macroscopic fused silica substrates.