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Journal Article

Interferometers for Displacement-Noise-Free Gravitational-Wave Detection

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

Pai,  Archana
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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2007_126.pdf
(Publisher version), 226KB

0603054v2.pdf
(Preprint), 146KB

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Citation

Chen, Y., Pai, A., Somiya, K., Kawamura, S., Sato, S., Kokeyama, K., et al. (2007). Interferometers for Displacement-Noise-Free Gravitational-Wave Detection. Physical Review Letters, 97: 151103. Retrieved from http://link.aps.org/abstract/PRL/v97/e151103.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-49F0-5
Abstract
We propose a class of displacement- and laser-noise free gravitational-wave-interferometer configurations, which does not sense non-geodesic mirror motions and laser noises, but provides non-vanishing gravitational-wave signal. Our interferometer consists of 4 mirrors and 2 beamsplitters, which form 4 Mach-Zehnder interferometers. By contrast to previous works, no composite mirrors are required. Each mirror in our configuration is sensed redundantly, by at least two pairs of incident and reflected beams. Displacement- and laser-noise free detection is achieved when output signals from these 4 interferometers are combined appropriately. Our 3-dimensional interferometer configuration has a low-frequency response proportional to f^2, which is better than the f^3 achievable by previous 2-dimensional configurations.