Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster II

Q 55.38: Poster

Donnerstag, 11. März 2010, 16:00–19:00, Lichthof

Michelson interferometer with 3-port grating coupled arm resonators — •Maximilian Wimmer, Michael Britzger, Daniel Friedrich, Oliver Burmeister, Björn Hemb, Karsten Danzmann, and Roman Schnabel — Institut für Gravitationsphysik, Leibniz Universität Hannover und Max-Planck-Institut für Gravitations-physik (Albert-Einstein-Institut) Callinstrasse 38 D-30167 Hannover

The signal to noise ratio in high precision interferometers such as gravitational wave detectors can be increased by maximizing the circulating laser power. In current laserinterferometric gravitational wave detectors partly transmissive optics are used as couplers and beamsplitters. In future detectors stronger light fields will increase thermal effects as the consequence of absorption of the transmitted part and this may lead to a limitation of the sensitivity. One possible solution for this problem is the change to all-reflective optics. Previous experiments have shown that the replacement of single interferometer elements is technically feasible. As the next step towards all-reflective interferometry we present the concept of an interferometer with arm cavities using so-called 3-port gratings as reflective cavity couplers.