Experimental demonstration of a suspended, diffractively coupled Fabry–Perot 
cavity

Edgar, M. P.; Wardell, Barry; Nelson, J.; Plissi, M. V.; Strain, K. A.; Burmeister, Oliver; Britzger, Michael; Danzmann, Karsten; Schnabel, Roman; Clausnitzer, T.; Brückner, F.; Kley, E.-B.; Tünnermann, A.

doi:10.1088/0264-9381/27/8/084029

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Experimental demonstration of a suspended, diffractively coupled Fabry–Perot cavity

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Wardell, Barry
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Strain, K. A.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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

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

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Citation

Edgar, M. P., Wardell, B., Nelson, J., Plissi, M. V., Strain, K. A., Burmeister, O., et al. (2010). Experimental demonstration of a suspended, diffractively coupled Fabry–Perot cavity. Classical and quantum gravity, 27: 084029. doi:10.1088/0264-9381/27/8/084029.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0012-B90D-6

Abstract

Diffraction gratings have been considered as input couplers for Fabry–Perot cavities in future gravitational wave detectors. We experimentally demonstrate the use of a triple-suspended, diffractively coupled cavity and examine conventional Pound–Drever–Hall length sensing and control techniques to maintain the required operating condition. Utilizing the diffractively coupled Fabry–Perot cavity, we investigate the effects associated with translational grating motion and observe a unique 1/f slope in the magnitude of the frequency response when monitoring the forward-reflected error signal.