Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-03-14
Phys.Rev.Lett.97:151103,2006
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
5 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.97.151103
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.
Chen Yanbei
Kawamura Seiji
Kokeyama Keiko
Pai Archana
Sato Shuichi
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