Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 26: Poster Wellenleitung & Informationsübertragung

Q 26.1: Poster

Montag, 7. März 2005, 11:00–12:30, Poster HU

GAWBS noise reduction in microstructured fibers — •Dominique Elser, Alexander Korn, Stefan Lorenz, Oliver Glöckl, Christoph Marquardt, Ulrik L. Andersen, and Gerd Leuchs — Institute of Optics, Information und Photonics (Max Planck Research Group), University of Erlangen-Nuremberg, Günther-Scharowsky-Str. 1, Bau 24, 91058 Erlangen

Guided Acoustic Wave Brillouin Scattering (GAWBS) generates phase and polarization noise of light propagating in glass fibers. This noise is a limiting factor for measurements at the quantum noise limit. In microstructured fibers, the mechanical coupling between core and cladding is much weaker than in standard fibers. Acoustic modes of the cladding are consequently strongly suppressed in the core. By means of a homodyne detection system we measure the noise spectra for different types of microstructured fibers and compare them with standard fibers. We find a strong suppression of GAWBS noise for frequencies up to 300 MHz.