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  Alignment sensing and control for squeezed vacuum states of light

Schreiber, E., Dooley, K. L., Vahlbruch, H., Affeldt, C., Bisht, A., Leong, J., et al. (2016). Alignment sensing and control for squeezed vacuum states of light. Optics Express, 24(1), 146-152. doi:10.1364/OE.24.000146.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7CC3-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7CC4-D
Genre: Journal Article

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 Creators:
Schreiber, Emil1, Author              
Dooley, Kathrine L.1, Author              
Vahlbruch, Henning1, Author              
Affeldt, Christoph1, Author              
Bisht, Aparna1, Author
Leong, Jonathan2, Author              
Lough, James1, Author
Prijatelj, Mirko, Author
Slutsky, Jacob, Author
Was, Michal, Author
Wittel, Holger1, Author              
Danzmann, Karsten1, Author              
Grote, Hartmut1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24011              

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Free keywords: Physics, Instrumentation and Detectors, physics.ins-det, Physics, Optics, physics.optics,Quantum Physics, quant-ph
 Abstract: Beam alignment is an important practical aspect of the application of squeezed states of light. Misalignments in the detection of squeezed light result in a reduction of the observable squeezing level. In the case of squeezed vacuum fields that contain only very few photons, special measures must be taken in order to sense and control the alignment of the essentially dark beam. The GEO600 gravitational wave detector employs a squeezed vacuum source to improve its detection sensitivity beyond the limits set by classical quantum shot noise. Here, we present our design and implementation of an alignment sensing and control scheme that ensures continuous optimal alignment of the squeezed vacuum field at GEO 600 on long time scales in the presence of free-swinging optics. This first demonstration of a squeezed light automatic alignment system will be of particular interest for future long-term applications of squeezed vacuum states of light.

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 Dates: 2015-07-232016
 Publication Status: Published in print
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 Identifiers: arXiv: 1507.06468
DOI: 10.1364/OE.24.000146
URI: http://arxiv.org/abs/1507.06468
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Title: Optics Express
  Abbreviation : Opt Express
Source Genre: Journal
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Publ. Info: Washington, DC : Optical Society of America
Pages: - Volume / Issue: 24 (1) Sequence Number: - Start / End Page: 146 - 152 Identifier: ISSN: 1094-4087
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925609918