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  Coherent Control of Vacuum Squeezing in the Gravitational-Wave Detection Band

Vahlbruch, H., Chelkowski, S., Hage, B., Franzen, A., Danzmann, K., & Schnabel, R. (2006). Coherent Control of Vacuum Squeezing in the Gravitational-Wave Detection Band. Physical Review Letters, 97: 011101. doi:10.1103/PhysRevLett.97.011101.

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 Creators:
Vahlbruch, Henning1, Author           
Chelkowski, Simon1, 2, Author
Hage, Boris1, Author           
Franzen, Alexander1, 2, 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              
2AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24009              

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 Abstract: We propose and demonstrate a coherent control scheme for stable phase locking of squeezed vacuum fields. We focus on sideband fields at frequencies from 10 Hz to 10 kHz, which is a frequency regime of particular interest in gravitational-wave detection and for which conventional control schemes have failed so far. A vacuum field with broadband squeezing covering this entire band was produced using optical parametric oscillation and characterized with balanced homodyne detection. The system was stably controlled over long periods utilizing two coherent but frequency shifted control fields. In order to demonstrate the performance of our setup the squeezed field was used for a nonclassical sensitivity improvement of a Michelson interferometer at audio frequencies.

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 Dates: 2006-07
 Publication Status: Issued
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 Identifiers: eDoc: 286675
DOI: 10.1103/PhysRevLett.97.011101
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Title: Physical Review Letters
Source Genre: Journal
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Pages: - Volume / Issue: 97 Sequence Number: 011101 Start / End Page: - Identifier: -