Active noise cancellation in a suspended interferometer

Details Active noise cancellation in a suspended interferometer Active noise cancellation in a suspended interferometer

2011-12-09

arxiv.org/abs/1112.2224v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

PACS numbers: 04.80.Nn, 95.55.Ym, 07.60.Ly, 42.62.Eh

Scientific paper

We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common Least Mean Square (LMS) adaptive filter algorithm. We compare the experimental results with theoretical estimates of the cancellation efficiency. Using data from the recent LIGO Science Run, we also estimate the impact of this technique on full scale gravitational wave interferometers. In the future, we expect to use this technique to also remove acoustic, magnetic, and gravitational noise perturbations from the LIGO interferometers. This noise cancellation technique is simple enough to implement in standard laboratory environments and can be used to improve SNR for a variety of high precision experiments.

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