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Q: Fachverband Quantenoptik und Photonik

Q 57: Optomechanics II

Q 57.8: Vortrag

Donnerstag, 26. März 2015, 16:15–16:30, P/H1

Optomechanics in a Michelson-Sagnac Interferometer — •Lisa Kleybolte¹, Andreas Sawadsky¹, and Roman Schnabel² — ¹Institut für Gravitationsphysik, Leibniz Universität Hannover — ²Institut für Laserphysik, Universität Hamburg

The signal-recycled Michelson-Sagnac interferometer with a SiN-membrane as a mechanical oscillator is a manifold topology for the investigation of the optomechanical coupling. Beside the successful demonstration of dissipative coupling, this interferometer topology could reach a broadband radiation pressure noise (RPN) limited displacement sensitivity. Therefor thermal noise and shot noise have to be significantly reduced. Here we present spectra of a Michelson-Sagnac Interferometer operating in a cryogenic environment at 8K. Furthermore we show how the input of squeezed light into the dark port could influence the optomechanical coupling in our system and how it will be used to improve our sensitivity to reach the RPN.