Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology

Q 16.70: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

The Frequency Reference Cavity for the AEI 10 m Prototype Interferometer — •Manuela Hanke — AEI Hannover

The 10 m Prototype facility, currently being set up at the AEI Hannover, will provide a testbed for very sensitive interferometric experiments. One ambitious goal of this project is to reach and subsequently even surpass the Standard Quantum Limit in a detection band around 200 Hz with a 10 m arm length Michelson interferometer. In order to pursue such an avenue, the laser source must be extremely well stabilized. The laser source is a AEI-LZH 35 W Nd:YAG laser also used to drive the km-scale gravitational wave observatories, LIGO and GEO 600. A 23 m long fully suspended triangular ring cavity of finesse ca. 3000 will be used as a frequency reference for the stabilization of the laser. The aim of this project, the frequency reference cavity, is to reach a level of laser frequency fluctuations of better than 10⁻⁵/√Hz in the detection band, centered around 200 Hz. Therefore we need to reduce the frequency noise of the free running laser by a factor of a million. The most important goal is to make a sufficiently stabilized laser beam available for the AEI 10 m Prototype Interferometer, with a duty cycle that is not limiting the operation of the core instrument by any means.