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

Published

August 30, 2010

Author(s)

Michael J. Thorpe, David R. Leibrandt, Tara M. Fortier, Till P. Rosenband

Abstract

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 using 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.

Citation

Applied Physics B

Volume

16

Pub Type

Journals

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Keywords

laser stabilization, noise cancellation, optical cavities

Citation

Thorpe, M. , Leibrandt, D. , Fortier, T. and Rosenband, T. (2010), Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser, Applied Physics B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905732 (Accessed November 23, 2024)