DC-readout of a signal-recycled gravitational wave detector

S. Hild; H. Grote; J. Degallaix; S. Chelkowski; K. Danzmann; A. Freise; M. Hewitson; J. Hough; H. Luck; M. Prijatelj; K.A. Strain; J.R. Smith; B. Willke

doi:10.1088/0264-9381/26/5/055012

DC-readout of a signal-recycled gravitational wave detector

S. Hild^*, H. Grote, J. Degallaix, S. Chelkowski, K. Danzmann, A. Freise, M. Hewitson, J. Hough, H. Luck, M. Prijatelj, K.A. Strain, J.R. Smith, B. Willke

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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.

Original language	English
Article number	055012
Number of pages	10
Journal	Classical and Quantum Gravity
Volume	26
Issue number	5
DOIs	https://doi.org/10.1088/0264-9381/26/5/055012
Publication status	Published - 7 Mar 2009
Externally published	Yes

Keywords

NOISE

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10.1088/0264-9381/26/5/055012

Cite this

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title = "DC-readout of a signal-recycled gravitational wave detector",

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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TY - JOUR

T1 - DC-readout of a signal-recycled gravitational wave detector

AU - Hild, S.

AU - Grote, H.

AU - Degallaix, J.

AU - Chelkowski, S.

AU - Danzmann, K.

AU - Freise, A.

AU - Hewitson, M.

AU - Hough, J.

AU - Luck, H.

AU - Prijatelj, M.

AU - Strain, K.A.

AU - Smith, J.R.

AU - Willke, B.

PY - 2009/3/7

Y1 - 2009/3/7

N2 - 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.

AB - 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.

KW - NOISE

U2 - 10.1088/0264-9381/26/5/055012

DO - 10.1088/0264-9381/26/5/055012

M3 - Article

SN - 0264-9381

VL - 26

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

IS - 5

M1 - 055012

ER -

DC-readout of a signal-recycled gravitational wave detector

Abstract

Keywords

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