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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.25: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Single optical microfibre interferometer — •Konstantin Karapetyan, Wolfgang Alt, Fabian Bruse, and Dieter Meschede — Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, 53115, Bonn, Germany

Over the last seven years, optical microfibres (OMF) with a diameter on the order of 100...1000 nm operating in the strong guiding regime have been investigated and applied in various fields of physics and photonics, including evanescent field spectroscopy, atom trapping and non-linear optics. In this work we present a single OMF interferometer—a monolithic single-fibre device for dispersive sensing. It uses the down-taper of an OMF as a beam splitter and the up-taper as a beam recombiner, as in a Mach-Zehnder interferometer. The two arms are realized here by two different transverse modes guided in the waist of the OMF. Details of the design, manufacturing and testing of this device as well as our first results on dispersive sensing of liquids, molecules and atoms are presented.