Skip to main content
Article thumbnail
Location of Repository

A Precision Angle Sensor using an Optical Lever inside a Sagnac Interferometer

By J. M. Hogan, J. Hammer, S. -w. Chiow, S. Dickerson, D. M. S. Johnson, T. Kovachy, A. Sugarbaker and M. A. Kasevich


We built an ultra low noise angle sensor by combining a folded optical lever and a Sagnac interferometer. The instrument has a measured noise floor of 1.3 prad / Hz^(1/2) at 2.4 kHz. We achieve this record angle sensitivity using a proof-of-concept apparatus with a conservative N=11 bounces in the optical lever. This technique could be extended to reach sub-picoradian / Hz^(1/2) sensitivities with an optimized design.Comment: 3 pages, 4 figure

Topics: Physics - Optics
Year: 2011
DOI identifier: 10.1364/OL.36.001698
OAI identifier:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.