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  First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory

Grote, H., Danzmann, K., Dooley, K. L., Schnabel, R., Slutsky, J., & Vahlbruch, H. (2013). First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory. Physical Review Letters, 110: 181101. doi:10.1103/PhysRevLett.110.181101.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-E9F2-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-E9F4-2
Genre: Journal Article

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 Creators:
Grote, H.1, Author              
Danzmann, K.1, Author              
Dooley, K. L., Author
Schnabel, R.1, Author              
Slutsky, J., Author
Vahlbruch, H.1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Physics, Instrumentation and Detectors, physics.ins-det, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: We report on the first long-term application of squeezed vacuum states of light to improve the shot-noise-limited sensitivity of a gravitational-wave observatory. In particular, squeezed vacuum was applied to the German/British detector GEO600 during a period of three months from June to August 2011, when GEO600 was performing an observational run together with the French/Italian Virgo detector. In a second period squeezing application continued for about 11 months from November 2011 to October 2012. During this time, squeezed vacuum was applied for 90.2% (205.2 days total) of the time that science-quality data was acquired with GEO600. Sensitivity increase from squeezed vacuum application was observed broad-band above 400Hz. The time average of gain in sensitivity was 26% (2.0dB), determined in the frequency band from 3.7kHz to 4.0kHz. This corresponds to a factor of two increase in observed volume of the universe, for sources in the kHz region (e.g. supernovae, magnetars). We introduce three new techniques to enable stable long-term application of squeezed light, and show that the glitch-rate of the detector did not increase from squeezing application. Squeezed vacuum states of light have arrived as a permanent application, capable of increasing the astrophysical reach of gravitational-wave detectors.

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 Dates: 2013-02-082013-03-1420132013
 Publication Status: Published in print
 Pages: 4 pages, 4 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1302.2188
DOI: 10.1103/PhysRevLett.110.181101
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Title: Physical Review Letters
Source Genre: Journal
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Publ. Info: Woodbury, N.Y., etc. : American Physical Society.
Pages: - Volume / Issue: 110 Sequence Number: 181101 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1