An all-photonic focal-plane wavefront sensor
BRM Norris, J Wei, CH Betters, A Wong… - Nature …, 2020 - nature.com
Adaptive optics (AO) is critical in astronomy, optical communications and remote sensing to
deal with the rapid blurring caused by the Earth's turbulent atmosphere. But current AO …
deal with the rapid blurring caused by the Earth's turbulent atmosphere. But current AO …
Low wind effect on VLT/SPHERE: impact, mitigation strategy, and results
J Milli, M Kasper, P Bourget… - … Optics Systems VI, 2018 - spiedigitallibrary.org
The low wind effect is a phenomenon disturbing the phase of the wavefront in the pupil of a
large telescope obstructed by spiders, in the absence of wind. It can be explained by the …
large telescope obstructed by spiders, in the absence of wind. It can be explained by the …
SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is an extremely
modular high-contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has …
modular high-contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has …
Confusion in differential piston measurement with the pyramid wavefront sensor
A Bertrou-Cantou, E Gendron, G Rousset… - Astronomy & …, 2022 - aanda.org
Context. The pyramid was proven to be a highly sensitive and versatile wave-front sensor
(WFS) and has been selected to be installed on the single conjugate adaptive optics (AO) …
(WFS) and has been selected to be installed on the single conjugate adaptive optics (AO) …
Astrophotonics-current capabilities and the road ahead
Astrophotonics represents a cutting-edge approach in observational astronomy. This paper
explores the significant advancements and potential applications of astrophotonics …
explores the significant advancements and potential applications of astrophotonics …
Focal-plane wavefront sensing with photonic lanterns: theoretical framework
The photonic lantern (PL) is a tapered waveguide that can efficiently couple light into
multiple single-mode optical fibers. Such devices are currently being considered for a …
multiple single-mode optical fibers. Such devices are currently being considered for a …
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a zernike phase-mask sensor-iii. on-sky validation in vlt/sphere
Second-generation exoplanet imagers using extreme adaptive optics (ExAO) and
coronagraphy have demonstrated their great potential for studying close circumstellar …
coronagraphy have demonstrated their great potential for studying close circumstellar …
Review on methods for wavefront reconstruction from pyramid wavefront sensor data
I Shatokhina, V Hutterer… - Journal of Astronomical …, 2020 - spiedigitallibrary.org
Pyramid wavefront sensors are planned to be a part of many instruments that are currently
under development for the extremely large telescopes (ELT). The unprecedented scales of …
under development for the extremely large telescopes (ELT). The unprecedented scales of …
Low-wind-effect impact on Shack-Hartmann-based adaptive optics-Partial control solution in the context of SPHERE and GRAVITY+
Context. The low wind effect (LWE) occurs at the aperture of 8-meter class telescopes when
the spiders holding the secondary mirror get significantly cooler than the air. The effect …
the spiders holding the secondary mirror get significantly cooler than the air. The effect …
On-sky verification of Fast and Furious focal-plane wavefront sensing: Moving forward toward controlling the island effect at Subaru/SCExAO
Context. High-contrast imaging (HCI) observations of exoplanets can be limited by the island
effect (IE). The IE occurs when the main wavefront sensor (WFS) cannot measure sharp …
effect (IE). The IE occurs when the main wavefront sensor (WFS) cannot measure sharp …