A Precision Angle Sensor using an Optical Lever inside a Sagnac Interferometer
Optics
2015-05-27 v1
Abstract
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.
Keywords
Cite
@article{arxiv.1102.5354,
title = {A Precision Angle Sensor using an Optical Lever inside a Sagnac Interferometer},
author = {J. M. Hogan and J. Hammer and S. -w. Chiow and S. Dickerson and D. M. S. Johnson and T. Kovachy and A. Sugarbaker and M. A. Kasevich},
journal= {arXiv preprint arXiv:1102.5354},
year = {2015}
}
Comments
3 pages, 4 figures