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Peer-reviewedCC BYJournal of Optics

Space-time wave packets propagating a kilometer in air

  • Layton A. Hall1
  • Miguel A. Romer1
  • Bryan L. Turo1
  • Tina M. Hayward2
  • Rajesh Menon2
  • Ayman F. Abouraddy1
  1. 1University of Central Florida
  2. 2University of Utah
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Abstract

We report on the diffraction-free propagation of space-time wave packets (STWPs) – a class of propagation-invariant pulsed beams—for ∼ 1 km in an open-air laser range in a low-turbulence scenario. Making use of ≈ 100 fs pulses (bandwidth ∼ 25 nm) at a wavelength of ≈ 1 μ m, we construct an STWP with a transverse width of ≈ 2 mm that expands to ≈ 3 mm after ∼ 500 m, and another that expands from ≈ 8 mm to ≈ 10 mm after 1 km. The propagation of the STWPs is compared with that of Gaussian wave packets of the same transverse spatial width and bandwidth. We establish a theoretical model that accounts for the key factors limiting the STWP propagation distance and suggests a path to further extending it.

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Cite

BibTeXRIS
BibTeX
@article{hall2026spacetime,
  title = {{Space-time wave packets propagating a kilometer in air}},
  author = {Layton A. Hall and Miguel A. Romer and Bryan L. Turo and Tina M. Hayward and Rajesh Menon and Ayman F. Abouraddy},
  journal = {Journal of Optics},
  year = {2026},
  month = sep,
  doi = {10.1088/2040-8986/aeaa08},
  url = {https://doi.org/10.1088/2040-8986/aeaa08},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Space-time wave packets propagating a kilometer in air
AU  - Layton A. Hall
AU  - Miguel A. Romer
AU  - Bryan L. Turo
AU  - Tina M. Hayward
AU  - Rajesh Menon
AU  - Ayman F. Abouraddy
PY  - 2026
DA  - 2026/09/01
JO  - Journal of Optics
DO  - 10.1088/2040-8986/aeaa08
UR  - https://doi.org/10.1088/2040-8986/aeaa08
AB  - We report on the diffraction-free propagation of space-time wave packets (STWPs) – a class of propagation-invariant pulsed beams—for ∼ 1 km in an open-air laser range in a low-turbulence scenario. Making use of ≈ 100 fs pulses (bandwidth ∼ 25 nm) at a wavelength of ≈ 1 μ m, we construct an STWP with a transverse width of ≈ 2 mm that expands to ≈ 3 mm after ∼ 500 m, and another that expands from ≈ 8 mm to ≈ 10 mm after 1 km. The propagation of the STWPs is compared with that of Gaussian wave packets of the same transverse spatial width and bandwidth. We establish a theoretical model that accounts for the key factors limiting the STWP propagation distance and suggests a path to further extending it.
SN  - 0150-536X
SN  - 2040-8978
SN  - 2040-8986
SN  - 2056-7162
ER  -