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Review of Scientific Instruments / Volume 83 / Issue 2 / ARTICLES / Gravity; Geophysics; Astronomy and Astrophysics

Rev. Sci. Instrum. 83, 024501 (2012); http://dx.doi.org/10.1063/1.3675891 (6 pages)

Active noise cancellation in a suspended interferometer

Jennifer C. Driggers1, Matthew Evans2, Keenan Pepper3, and Rana Adhikari1

1LIGO Laboratory, California Institute of Technology, Pasadena, California 91125, USA
2LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
3Department of Physics, University of California, Berkeley, California 94720, USA

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(Received 24 June 2011; accepted 15 December 2011; published online 2 February 2012)

We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common least mean square adaptive filter algorithm. We compare the experimental results with theoretical estimates of the cancellation efficiency. Using data from the recent Laser Interferometer Gravitational Wave Observatory (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 also to 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 signal-to-noise ratio for a variety of high precision experiments.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. STATIC WIENER FILTERING
  3. WIENER FILTERING AT THE 40 m INTERFEROMETER
  4. APPLYING WIENER FILTERING TO A 4 km LIGO INTERFEROMETER
  5. ONLINE ADAPTIVE FILTERING AT THE 40 m INTERFEROMETER
  6. CONCLUSIONS

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KEYWORDS, PACS, and IPC

Keywords

adaptive filters, Fabry-Perot interferometers, feedforward, gravitational waves, interference suppression, least mean squares methods, vibration isolation, Wiener filters

PACS

  • 04.30.-w

    Gravitational waves

  • 07.60.Ly

    Interferometers

  • 95.55.Ym

    Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

  • 02.70.Rr

    General statistical methods

International Patent Classification (IPC)

  • F16F

    Springs; Shock-absorbers; Means for damping vibration

  • F16F15/00

    Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion

  • G01B9/02

    Interferometers

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3675891

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    P. R. Saulson, Phys. Rev. D 30, 732 (1984).

    S. A. Hughes and K. S. Thorne, Phys. Rev. D 58, 122002 (1998).

    J. A. Giaime, P. Saha, D. Shoemaker, and L. Sievers, Rev. Sci. Instrum. 67, 208 (1996)RSINAK000067000001000208000001.


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