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  Phase Control of Squeezed Vacuum States of Light in Gravitational Wave Detectors

Dooley, K., Schreiber, E., Vahlbruch, H., Affeldt, C., Leong, J., Wittel, H., et al. (2015). Phase Control of Squeezed Vacuum States of Light in Gravitational Wave Detectors. Optics Express, 23(7), 8235-8245. doi:10.1364/OE.23.008235.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CCE3-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CCE4-E
Genre: Journal Article

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 Creators:
Dooley, Kate1, Author              
Schreiber, Emil1, Author              
Vahlbruch, Henning1, Author              
Affeldt, Christoph1, Author              
Leong, Jonathan2, Author              
Wittel, Holger1, Author              
Grote, Hartmut1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Physics, Instrumentation and Detectors, physics.ins-det, Physics, Optics, physics.optics
 Abstract: Quantum noise will be the dominant noise source for the advanced laser interferometric gravitational wave detectors currently under construction. Squeezing-enhanced laser interferometers have been recently demonstrated as a viable technique to reduce quantum noise. We propose two new methods of generating an error signal for matching the longitudinal phase of squeezed vacuum states of light to the phase of the laser interferometer output field. Both provide a superior signal to the one used in previous demonstrations of squeezing applied to a gravitational-wave detector. We demonstrate that the new signals are less sensitive to misalignments and higher order modes, and result in an improved stability of the squeezing level. The new signals also offer the potential of reducing the overall rms phase noise and optical losses, each of which would contribute to achieving a higher level of squeezing. The new error signals are a pivotal development towards realizing the goal of 6 dB and more of squeezing in advanced detectors and beyond.

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 Dates: 2014-11-132015
 Publication Status: Published in print
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 Identifiers: arXiv: 1411.3454
DOI: 10.1364/OE.23.008235
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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: 23 (7) Sequence Number: - Start / End Page: 8235 - 8245 Identifier: ISSN: 1094-4087
CoNE: /journals/resource/954925609918