Deep frequency modulation interferometry combines optical minimalism with multi-fringe readout. Precision however is key for applications such as optical gradiometers for satellite geodesy or as dimensional sensor for ground-based gravity experiments. We present a single-component interferometer smaller than a cubic inch. Two of these are compared to each other to demonstrate tilt and displacement measurements with a precision of less than 20nrad/Hz and 1pm/Hz at frequencies below 1Hz.
@article{arxiv.1903.02945,
title = {Compact multi-fringe interferometry with sub-picometer precision},
author = {Katharina-Sophie Isleif and Gerhard Heinzel and Moritz Mehmet and Oliver Gerberding},
journal= {arXiv preprint arXiv:1903.02945},
year = {2019}
}
Comments
6 pages, 4 figures, accepted in Physical Review Applied