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  The GEO 600 squeezed light source

Vahlbruch, H., Khalaidovski, A., Lastzka, N., Gräf, C., Danzmann, K., & Schnabel, R. (2010). The GEO 600 squeezed light source. Classical and Quantum Gravity, 27: 084027. doi:10.1088/0264-9381/27/8/084027.

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CQG_27_8_084027.pdf (Any fulltext), 859KB
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Vahlbruch, Henning1, Author           
Khalaidovski, Alexander1, Author           
Lastzka, Nico1, Author           
Gräf, Christian1, Author           
Danzmann, Karsten1, Author           
Schnabel, Roman1, Author           
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: The next upgrade of the GEO 600 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 1.5 m2 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 9 dB below the shot-noise level was observed in the detection band between 10 Hz and 10 kHz. 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 GEO 600 detector.

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 Dates: 2010
 Publication Status: Issued
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 Identifiers: DOI: 10.1088/0264-9381/27/8/084027
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Title: Classical and Quantum Gravity
Source Genre: Journal
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Publ. Info: Bristol, U.K. : Institute of Physics
Pages: - Volume / Issue: 27 Sequence Number: 084027 Start / End Page: - Identifier: Other: 954925513480
Other: 0264-9381