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  Measurement and simulation of laser power noise in GEO 600

Smith, J. R., Degallaix, J., Freise, A., Grote, H., Hewitson, M., Hild, S., et al. (2008). Measurement and simulation of laser power noise in GEO 600. Classical and Quantum Gravity, 25(3): 035003. doi:10.1088/0264-9381/25/3/035003.

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cqg8_3_035003.pdf (Verlagsversion), 745KB
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Smith, J. R.1, Autor
Degallaix, Jerome1, Autor           
Freise, A.2, Autor
Grote, Hartmut1, Autor           
Hewitson, Martin3, Autor           
Hild, Stefan1, Autor           
Lück, Harald1, Autor           
Strain, Kenneth A.1, Autor           
Willke, Benno1, Autor           
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24010              
2External Organizations, ou_persistent22              
3Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24011              

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 Zusammenfassung: This paper describes measurements and simulations related to power fluctuations of the laser light in the GEO 600 laser-interferometric gravitational wave detector. Measurements of the relative fluctuations of the light power at three different ports of the main interferometer are presented. In addition, measurements and simulations of the coupling transfer functions from power fluctuations at the input laser to these ports are shown. The transfer function from the input laser to the output port of the interferometer is found to be non-trivial. Despite this, the numerical simulation produces an excellent match to it and gives insight to the mechanisms leading to the complicated shape. Furthermore, the coupling transfer functions of power fluctuations to the main (heterodyne) detector outputs are measured and simulated. These are used to evaluate the level with which laser power fluctuations contribute to the overall noise level of the instrument.

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Sprache(n): eng - English
 Datum: 2008-02
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1088/0264-9381/25/3/035003
eDoc: 374053
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Titel: Classical and Quantum Gravity
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 25 (3) Artikelnummer: 035003 Start- / Endseite: - Identifikator: ISSN: 1361-6382