Düsseldorf 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 65: Poster Photonik
Q 65.4: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster C
Fabrication and Strain Tuning of Glass Fiber-Based Whispering-Gallery-Mode Bottle Resonators — •Michael Pöllinger1,2, Florian Warken1, Wolfgang Alt1, Dieter Meschede1, and Arno Rauschenbeutel1,2 — 1Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, 53115 Bonn — 2Institut für Physik, Universität Mainz, 55099 Mainz
We present our recent results on the fabrication and characterization of a novel type of highly prolate shaped whispering-gallery-mode resonators with an advantageous mode geometry and spectrum [1]. We realize the “bottle resonator” structures starting from glass fibers. The fibers are flame heated and elongated to produce a 15-µm diameter waist and then microstructured by focused CO2 laser heating. The resulting small radius modulations are then measured using a diffraction technique that allows us to determine the resonator profile with a sub-micron precision. The resonators are spectrally characterized in a setup where light is coupled in and out by means of micron sized coupling fibers. Furthermore this setup allows us to apply strain to the resonator, thereby tuning its resonance frequency. Tuning over more than one free spectral range has been achieved. Quality factors in the Q=105 range have been observed. Our current efforts aim at enhancing Q by working with custom made glass fibers made of high quality glass. Ideally, values in the Q=108–109 range should be achievable.
We acknowledge financial support by the DFG research unit 557.
[1] Y. Louyer, D. Meschede, and A. Rauschenbeutel, Phys. Rev. A 72, 031801(R) (2005).