| 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 |
| Volume: |
16 |
| 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) |
