The GEO600 squeezed light source

Details The GEO600 squeezed light source The GEO600 squeezed light source

2010-04-28

arxiv.org/abs/1004.4975v1

Class.Quant.Grav.27:084027,2010

Physics

Quantum Physics

8 pages, 4 figures

Scientific paper

The next upgrade of the GEO600 gravitational wave detector is scheduled for 2010 and will, in particular, involve the implementation of squeezed light. The required non-classical light source is assembled on a 1.5m^2 breadboard and includes a full coherent control system and a diagnostic balanced homodyne detector. Here, we present the first experimental characterization of this setup as well as a detailed description of its optical layout. A squeezed quantum noise of up to 9dB below the shot-noise level was observed in the detection band between 10Hz and 10kHz. We also present an analysis of the optical loss in our experiment and provide an estimation of the possible non-classical sensitivity improvement of the future squeezed light enhanced GEO600 detector.

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