Abstract
The change in length of an optical fiber-based Fabry-Pérot cavity (FPC) can be precisely measured using phase tracking, but the displacement range is limited by phase ambiguity. Period tracking techniques determine the absolute FPC length, but with larger uncertainties from tracking the spacing between multiple peaks. A hybrid method is demonstrated that identifies appropriate peaks for phase tracking using a coarse estimate obtained from the free spectral range to effectively maintain the high precision (∼1 nm) of phase tracking techniques to measure ∼24 µm displacements, well beyond the range limitations (typically <1 µm) of phase tracking methods.
| Original language | English |
|---|---|
| Pages (from-to) | 29148-29160 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 30 |
| Issue number | 16 |
| DOIs | |
| State | Published - Aug 1 2022 |
Funding
Office of Nuclear Energy. Acknowledgments. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). The authors would like to thank Dr. Brandon Wilson and Dr. Adrian Schrell for their valuable technical feedback regarding this work. This work was supported by the Versatile Test Reactor Program of the US Department of Energy, Office of Nuclear Energy.
| Funders | Funder number |
|---|---|
| Nuclear Energy | |
| Versatile Test Reactor Program | |
| U.S. Department of Energy | |
| Office of Nuclear Energy |