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Demonstration of displacement-noise-free interferometry using bi-directional Mach–Zehnder interferometers

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

Pai,  A.
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;

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cqg8_11_114031.pdf
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Citation

Sato, S., Kokeyama, K., Kawamura, S., Ward, R. L., Nishizawa, A., Chen, Y., et al. (2008). Demonstration of displacement-noise-free interferometry using bi-directional Mach–Zehnder interferometers. Classical and Quantum Gravity, 25(11): 114031.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-63D9-2
Abstract
We have demonstrated displacement- and frequency-noise-free laser interferometry (DFI) by partially implementing a recently proposed optical configuration using bi-directional Mach–Zehnder interferometers (MZIs). This partial implementation, the minimum necessary to be called DFI, has confirmed the essential feature of DFI: the combination of two MZI signals can be carried out in a way that cancels the displacement noise of the mirrors and beam splitters while maintaining gravitational-wave signals. The attained maximum displacement noise suppression was 45 dB.