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Peer-reviewedarXiv licenceOptics Letters

Estimation of the laser guide star uplink tip-tilt using aperture size diversity

  • Pierre Jouve
  • Thierry Fusco
  • Carlos Correia
  • Cédric Taissir Heritier
  • Jean-François Sauvage
  • Benoit Neichel
Open at sourcePDFDOICite

Abstract

Laser guide star (LGS) adaptive optics cannot directly measure tip-tilt (TT), forcing reliance on natural guide stars and limiting sky coverage. We propose estimating the uplink TT from telemetry acquired at the laser launch telescope alone, operated in a monostatic configuration as both emitter and receiver. Extracting TT over concentric disks of different diameters within the receiving pupil yields signals mixing uplink and downlink contributions in different proportions; this aperture size diversity, combined with an LMMSE estimator, disentangles the uplink component. Simulations show a residual error of 24 mas for a single turbulent layer and 34 mas with two layers.

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Cite

BibTeXRIS
BibTeX
@article{jouve2026estimation,
  title = {{Estimation of the laser guide star uplink tip-tilt using aperture size diversity}},
  author = {Pierre Jouve and Thierry Fusco and Carlos Correia and Cédric Taissir Heritier and Jean-François Sauvage and Benoit Neichel},
  journal = {Optics Letters},
  year = {2026},
  month = sep,
  doi = {10.1364/ol.611519},
  eprint = {2607.12494},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05793863v1},
}
RIS
TY  - JOUR
TI  - Estimation of the laser guide star uplink tip-tilt using aperture size diversity
AU  - Pierre Jouve
AU  - Thierry Fusco
AU  - Carlos Correia
AU  - Cédric Taissir Heritier
AU  - Jean-François Sauvage
AU  - Benoit Neichel
PY  - 2026
DA  - 2026/09/14
JO  - Optics Letters
DO  - 10.1364/ol.611519
UR  - https://hal.science/hal-05793863v1
AB  - Laser guide star (LGS) adaptive optics cannot directly measure tip-tilt (TT), forcing reliance on natural guide stars and limiting sky coverage. We propose estimating the uplink TT from telemetry acquired at the laser launch telescope alone, operated in a monostatic configuration as both emitter and receiver. Extracting TT over concentric disks of different diameters within the receiving pupil yields signals mixing uplink and downlink contributions in different proportions; this aperture size diversity, combined with an LMMSE estimator, disentangles the uplink component. Simulations show a residual error of 24 mas for a single turbulent layer and 34 mas with two layers.
SN  - 0146-9592
SN  - 1539-4794
ER  -