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|Author(s):||Michael J. Thorpe; David R. Leibrandt; Tara M. Fortier; Till P. Rosenband;|
|Title:||Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser|
|Published:||August 30, 2010|
|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|
|Pages:||pp. 18744 - 18751|
|Keywords:||laser stabilization,noise cancellation,optical cavities|
|Research Areas:||Physics, Laser Physics, Time and Frequency|
|PDF version:||Click here to retrieve PDF version of paper (2MB)|