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Local readout enhancement for detuned signal-recycling interferometers

MPG-Autoren
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Müller-Ebhardt,  Helge
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Rehbein,  Henning
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Schnabel,  Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Chen,  Yanbei
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

Li,  Chao
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Theoretical Gravitational Wave Physics, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Somiya,  Kentaro
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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prd76_062002.pdf
(Verlagsversion), 276KB

0705.2987v2.pdf
(Preprint), 260KB

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Zitation

Müller-Ebhardt, H., Rehbein, H., Schnabel, R., Danzmann, K., Chen, Y., Li, C., et al. (2007). Local readout enhancement for detuned signal-recycling interferometers. Physical Review D, 76(6): 062002. doi:10.1103/PhysRevD.76.062002.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0013-47EB-9
Zusammenfassung
Motivated by the optical-bar scheme of Braginsky, Gorodetsky and Khalili, we propose to add to a high power detuned signal-recycling interferometer a local readout scheme which measures the motion of the arm-cavity front mirror. At low frequencies this mirror moves together with the arm-cavity end mirror, under the influence of gravitational waves. This scheme improves the low-frequency quantum-noise-limited sensitivity of optical-spring interferometers significantly and can be considered as a incorporation of the optical-bar scheme into currently planned second-generation interferometers. On the other hand it can be regarded as an extension of the optical bar scheme. Taking compact-binary inspiral signals as an example, we illustrate how this scheme can be used to improve the sensitivity of the planned Advanced LIGO interferometer, in various scenarios, using a realistic classical-noise budget. We also discuss how this scheme can be implemented in Advanced LIGO with relative ease.