High-accuracy longitudinal position measurement using self-accelerating light
Prabhakar, Shashi; Plachta, Stephen Z.D.; Ornigotti, Marco; Fickler, Robert (2021-04)
Prabhakar, Shashi
Plachta, Stephen Z.D.
Ornigotti, Marco
Fickler, Robert
04 / 2021
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202302082148
https://urn.fi/URN:NBN:fi:tuni-202302082148
Kuvaus
Peer reviewed
Tiivistelmä
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 performa 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 lowrotation frequency, respectively. In our experiment,we achieve an accuracy of around 2 μm over a longitudinal range of more than 2 mm using a single beam and only two quadrant detectors. Because our method relies on single-beam interference and only requires a static generation and simple intensity measurements, it is intrinsically stable and could find applications in high-speed measurements of longitudinal position.
Kokoelmat
- TUNICRIS-julkaisut [17001]