Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.64: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Astigmatism compensation in a non-planar four mirror-Cavity — •Andreas Noack — Max Planck Institute for Gravitational Physics (Albert Einstein Institute Hannover) Callinstraße 38 / 30167 Hannover

One of the limiting noises in the second generation of interferometric gravitational wave detectors (GWD) is the thermal noise of the test masses. For the next generation GWD some methods have been proposed to reduce the thermal noise. One method suggests to use higher order modes instead of the fundamental Gaussian mode. Laguerre-Gaussian modes (LG) are compatible with spherical mirrors and can therefore be used in the current setup of the advanced GWDs. The best tradeoff between clipping loss in the current setup and thermal noise reduction is the LG33 mode. Our simulations and experimental results show that astigmatism prevents the LG33 mode from resonating inside a planar Bow-Tie-Cavity. We present the feasibility of using a non-planar four mirror Bow-Tie-Cavity as a mode cleaner for the LG33 mode.