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ID: 213925.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
Experimental characterization of frequency-dependent squeezed light
Authors:Chelkowski, Simon; Vahlbruch, Henning; Hage, Boris; Franzen, Alexander; Lastzka, Nico; Danzmann, Karsten; Schnabel, Roman
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Physical Review A
Volume:71
Sequence Number of Article:013806
Review Status:not specified
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Article
Communicated by:Karsten Danzmann
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Laser Interferometry & Gravitational Wave Astronomy
Identifiers:URL:http://link.aps.org/abstract/PRA/v71/e013806
DOI:10.1103/PhysRevA.71.013806
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