Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Precision Measurements and Metrology III

Q 29.7: Talk

Wednesday, March 10, 2010, 15:30–15:45, A 310

Towards the SQL: How to avoid thermal noise using detuned cavities — •Tobias Westphal for the AEI 10m Prototype — Albert Einstein Institut & MPI für Gravitationsphysik, Callinstrasse 38, 30167 Hannover

High sensitivity interferometric experiments are strongly pushing towards the fundamental limits of classical interferometry and beyond. However, thermal noise associated with the dielectric coating stacks of the interferometer mirrors imposes a potential show stopper on the way to such a sensitivity.

One possibile avenue towards a reduced coating thermal noise is to replace highly reflective mirrors by detuned cavities. These so called Khalili cavities will be used for the AEI 10m Prototype Interferometer sub-SQL experiment.

In this talk the theoretical framework will be presented along with the plans for the experimental realisation including the optical design and the according control schemes.