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  Experimental characterization of frequency-dependent squeezed light

Chelkowski, S., Vahlbruch, H., Hage, B., Franzen, A., Lastzka, N., Danzmann, K., et al. (2005). Experimental characterization of frequency-dependent squeezed light. Physical Review A, 71: 013806. doi:10.1103/PhysRevA.71.013806.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4EF1-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4EF2-C
Genre: Journal Article

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 Creators:
Chelkowski, Simon1, 2, Author
Vahlbruch, Henning2, Author              
Hage, Boris2, Author              
Franzen, Alexander1, 2, Author
Lastzka, Nico2, Author              
Danzmann, Karsten2, Author              
Schnabel, Roman2, Author              
Affiliations:
1AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24009              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: We report on the demonstration of broadband squeezed laser beams that show a frequency-dependent orientation of the squeezing ellipse. Carrier frequency as well as quadrature angle were stably locked to a reference laser beam at 1064 nm. This frequency-dependent squeezing was characterized in terms of noise power spectra and contour plots of Wigner functions. The latter were measured by quantum state tomography. Our tomograph allowed a stable lock to a local oscillator beam for arbitrary quadrature angles with ±1° precision. Frequency-dependent orientations of the squeezing ellipse are necessary for squeezed states of light to provide a broadband sensitivity improvement in third-generation gravitational-wave interferometers. We consider the application of our system to long-baseline interferometers such as a future squeezed-light upgraded GEO 600 detector.

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 Dates: 2005
 Publication Status: Published in print
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Title: Physical Review A
Source Genre: Journal
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Pages: - Volume / Issue: 71 Sequence Number: 013806 Start / End Page: - Identifier: -