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Double optical spring enhancement for gravitational wave detectors

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

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

Danilishin,  Stefan L.
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;

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PhRevD78-062003.pdf
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Zitation

Rehbein, H., Müller-Ebhardt, H., Somiya, K., Danilishin, S. L., Schnabel, R., Danzmann, K., et al. (2008). Double optical spring enhancement for gravitational wave detectors. Physical Review D, 78(6): 062003. doi:10.1103/PhysRevD.78.062003.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0013-6DAC-7
Zusammenfassung
Currently planned second-generation gravitational-wave laser interferometers such as Advanced LIGO exploit the extensively investigated signal-recycling technique. Candidate Advanced LIGO configurations are usually designed to have two resonances within the detection band, around which the sensitivity is enhanced: a stable optical resonance and an unstable optomechanical resonance—which is upshifted from the pendulum frequency due to the so-called optical-spring effect. As an alternative to a feedback control system, we propose an all-optical stabilization scheme, in which a second optical spring is employed, and the test mass is trapped by a stable ponderomotive potential well induced by two carrier light fields whose detunings have opposite signs. The double optical spring also brings additional flexibility in reshaping the noise spectral density and optimizing toward specific gravitational-wave sources. The presented scheme can be extended easily to a multi-optical-spring system that allows further optimization.