High-accuracy longitudinal position measurement using self-accelerating light
| Autor: | Prabhakar, Shashi, Plachta, Stephen, Ornigotti, Marco, Fickler, Robert |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Applied Optics 60, 3203-3210 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/AO.420590 |
| Popis: | Radially self-accelerating light exhibits an intensity pattern that describes a spiraling trajectory around the optical axis as the beam propagates. In this article, we show in simulation and experiment how such beams can be used to perform a high-accuracy distance measurement with respect to a reference using simple off-axis intensity detection. We demonstrate that generating beams whose intensity pattern simultaneously spirals with fast and slow rotation components enables a distance measurement with high accuracy over a broad range, using the high and low rotation frequency, respectively. In our experiment, we achieve an accuracy of around 2~$\mu$m over a longitudinal range of more than 2~mm using a single beam and only two quadrant detectors. As our method relies on single-beam interference and only requires a static generation and simple intensity measurements, it is intrinsically stable and might find applications in high-speed measurements of longitudinal position. Comment: 9 pages, 6 figures |
| Databáze: | arXiv |
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