Performance of a 1200 m long suspended Fabry-Perot cavity

Freise, Andreas; Casey, Morag M.; Gossler, Stefan; Grote, Hartmut; Heinzel, Gerhard; Lück, Harald; Robertson, D. I.; Strain, Kenneth A.; Ward, H.; Willke, Benno; Hough, Jim; Danzmann, Karsten

doi:10.1088/0264-9381/19/7/322

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Performance of a 1200 m long suspended Fabry-Perot cavity

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

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

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

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

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

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Willke, Benno
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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Citation

Freise, A., Casey, M. M., Gossler, S., Grote, H., Heinzel, G., Lück, H., et al. (2002). Performance of a 1200 m long suspended Fabry-Perot cavity. Classical and Quantum Gravity, 19(7), 1389-1397. doi:10.1088/0264-9381/19/7/322.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-53AA-9

Abstract

Using one arm of the Michelson interferometer and the power recycling mirror of the interferometric gravitational wave detector GEO 600, we created a Fabry-Perot cavity with a length of 1200 m. The main purpose of this experiment was to gather first experience with the main optics, its suspensions and the corresponding control systems. The residual displacement of a main mirror is about 150 nm rms. By stabilizing the length of the 1200 m long cavity to the pre-stabilized laser beam, we achieved an error point frequency noise of 100 muHz Hz(-1/2) at 100 Hz Fourier frequency. In addition we demonstrated the reliable performance of all included subsystems by several 10-hour-periods of continuous stable operation. Thus the full frequency stabilization scheme for GEO 600 was successfully tested