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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 18 — Aug. 30, 2010
  • pp: 18744–18751

Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser

Michael J. Thorpe, David R. Leibrandt, Tara M. Fortier, and Till Rosenband  »View Author Affiliations

Optics Express, Vol. 18, Issue 18, pp. 18744-18751 (2010)

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We demonstrate a method to measure and actively reduce the coupling of vibrations to the phase noise of a cavity-stabilized laser. This method uses the vibration noise of the laboratory environment rather than active drive to perturb the optical cavity. The laser phase noise is measured via a beat note with a second unperturbed ultra-stable laser while the vibrations are measured by accelerometers positioned around the cavity. A Wiener filter algorithm extracts the frequency and direction dependence of the cavity response function. Once the cavity response function is known, real-time noise cancellation can be implemented by use of the accelerometer measurements to predict and then cancel the laser phase fluctuations. We present real-time noise cancellation that results in a 25 dB reduction of the laser phase noise power spectral density.

© 2010 Optical Society of America

OCIS Codes
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(140.4780) Lasers and laser optics : Optical resonators
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

Original Manuscript: May 26, 2010
Revised Manuscript: July 21, 2010
Manuscript Accepted: July 22, 2010
Published: August 18, 2010

Michael J. Thorpe, David R. Leibrandt, Tara M. Fortier, and Till Rosenband, "Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser," Opt. Express 18, 18744-18751 (2010)

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