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  DC-readout of a signal-recycled gravitational wave detector

Hild, S., Grote, H., Degallaix, J., Chelkowski, S., Danzmann, K., Freise, A., et al. (2009). DC-readout of a signal-recycled gravitational wave detector. Classical and Quantum Gravity, 26(5): 055012. doi:10.1088/0264-9381/26/5/055012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4504-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4506-C
Genre: Journal Article

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 Creators:
Hild, Stefan1, Author              
Grote, Hartmut1, Author              
Degallaix, Jerome1, Author              
Chelkowski, S., Author
Danzmann, Karsten1, Author              
Freise, A., Author
Hewitson, Martin2, Author              
Hough, J., Author
Lück, Harald1, Author              
Prijatelj, M.1, Author              
Strain, Kenneth A.1, Author              
Smith, J. R., Author
Willke, Benno1, 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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 Abstract: All first-generation large-scale gravitational wave detectors are operated at the dark fringe and use a heterodyne readout employing radio frequency (RF) modulation-demodulation techniques. However, the experience in the currently running interferometers reveals several problems connected with a heterodyne readout, of which phase noise of the RF modulation is the most serious one. A homodyne detection scheme (DC-readout), using the highly stabilized and filtered carrier light as a local oscillator for the readout, is considered to be a favourable alternative. Recently a DC-readout scheme has been implemented on the GEO 600 detector. We describe the results of first measurements and give a comparison of the performance achieved with homodyne and heterodyne readout. The implications of the combined use of DC-readout and signal recycling are considered.

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 Dates: 2009-03-07
 Publication Status: Published in print
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 Identifiers: eDoc: 410467
DOI: 10.1088/0264-9381/26/5/055012
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Title: Classical and Quantum Gravity
Source Genre: Journal
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Pages: - Volume / Issue: 26 (5) Sequence Number: 055012 Start / End Page: - Identifier: ISSN: 0264-9381