Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed

Benjamin L. Gerard; Javier Perez-Soto; Vincent Chambouleyron; Maaike A. M. van Kooten; Daren Dillon; Sylvain Cetre; Rebecca Jensen-Clem; Qiang Fu; Hadi Amata; Wolfgang Heidrich

doi:10.1117/12.2630519

Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed

Benjamin L. Gerard, Javier Perez-Soto, Vincent Chambouleyron, Maaike A. M. van Kooten, Daren Dillon, Sylvain Cetre, Rebecca Jensen-Clem, Qiang Fu, Hadi Amata, Wolfgang Heidrich

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

Ground-based high contrast imaging (HCI) and extreme adaptive optics (AO) technologies have advanced to the point of enabling direct detections of gas-giant exoplanets orbiting beyond the snow lines around nearby young star systems. However, leftover wavefront errors using current HCI and AO technologies, realized as “speckles” in the coronagraphic science image, still limit HCI instrument sensitivities to detecting and characterizing lowermass, closer-in, and/or older/colder exoplanetary systems. Improving the performance of AO wavefront sensors (WFSs) and control techniques is critical to improving such HCI instrument sensitivity. Here we present three different ongoing wavefront sensing and control project developments on the Santa cruz Extreme AO Laboratory (SEAL) testbed: (1) “multi-WFS single congugate AO (SCAO)” using the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST) and a Shack Hartmann WFS, (2) pupil chopping for focal plane wavefront sensing, first with an external amplitude modulator and then with the DM as a phase-only modulator, and (3) a laboratory demonstration of enhanced linearity with the non-modulated bright Pyramid WFS (PWFS) compared to the regular PWFS. All three topics share a common theme of multi-WFS SCAO and/or second stage AO, presenting opportunities and applications to further investigate these techniques in the future.

Original language	English (US)
Title of host publication	Adaptive Optics Systems VIII
Publisher	SPIE
DOIs	https://doi.org/10.1117/12.2630519
State	Published - Aug 29 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-10-25
Acknowledgements: We gratefully acknowledge research support of the University of California Observatories and UCSC’s Lamat NSF REU program for funding this research. This work also benefited from the 2022 Exoplanet Summer Program in the Other Worlds Laboratory (OWL) at the University of California, Santa Cruz, a program funded by the Heising-Simons Foundation. Author B. Gerard thanks the 2018 SCExAO team for hosting discussions that led to the pupil chopping concept and the UCSC LAO group, particularly Dominic Sanchez, for discussions that led to the DM-based pupil chopping idea.

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https://repository.kaust.edu.sa/bitstream/10754/680212/5/121852H.pdf

Cite this

@inproceedings{9cf69cd9bda74f7c8cd613ecf11ad071,

title = "Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed",

abstract = "Ground-based high contrast imaging (HCI) and extreme adaptive optics (AO) technologies have advanced to the point of enabling direct detections of gas-giant exoplanets orbiting beyond the snow lines around nearby young star systems. However, leftover wavefront errors using current HCI and AO technologies, realized as “speckles” in the coronagraphic science image, still limit HCI instrument sensitivities to detecting and characterizing lowermass, closer-in, and/or older/colder exoplanetary systems. Improving the performance of AO wavefront sensors (WFSs) and control techniques is critical to improving such HCI instrument sensitivity. Here we present three different ongoing wavefront sensing and control project developments on the Santa cruz Extreme AO Laboratory (SEAL) testbed: (1) “multi-WFS single congugate AO (SCAO)” using the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST) and a Shack Hartmann WFS, (2) pupil chopping for focal plane wavefront sensing, first with an external amplitude modulator and then with the DM as a phase-only modulator, and (3) a laboratory demonstration of enhanced linearity with the non-modulated bright Pyramid WFS (PWFS) compared to the regular PWFS. All three topics share a common theme of multi-WFS SCAO and/or second stage AO, presenting opportunities and applications to further investigate these techniques in the future.",

author = "Gerard, {Benjamin L.} and Javier Perez-Soto and Vincent Chambouleyron and {van Kooten}, {Maaike A. M.} and Daren Dillon and Sylvain Cetre and Rebecca Jensen-Clem and Qiang Fu and Hadi Amata and Wolfgang Heidrich",

note = "KAUST Repository Item: Exported on 2022-10-25 Acknowledgements: We gratefully acknowledge research support of the University of California Observatories and UCSC{\textquoteright}s Lamat NSF REU program for funding this research. This work also benefited from the 2022 Exoplanet Summer Program in the Other Worlds Laboratory (OWL) at the University of California, Santa Cruz, a program funded by the Heising-Simons Foundation. Author B. Gerard thanks the 2018 SCExAO team for hosting discussions that led to the pupil chopping concept and the UCSC LAO group, particularly Dominic Sanchez, for discussions that led to the DM-based pupil chopping idea.",

year = "2022",

month = aug,

day = "29",

doi = "10.1117/12.2630519",

language = "English (US)",

booktitle = "Adaptive Optics Systems VIII",

publisher = "SPIE",

}

TY - GEN

T1 - Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed

AU - Gerard, Benjamin L.

AU - Perez-Soto, Javier

AU - Chambouleyron, Vincent

AU - van Kooten, Maaike A. M.

AU - Dillon, Daren

AU - Cetre, Sylvain

AU - Jensen-Clem, Rebecca

AU - Fu, Qiang

AU - Amata, Hadi

AU - Heidrich, Wolfgang

N1 - KAUST Repository Item: Exported on 2022-10-25 Acknowledgements: We gratefully acknowledge research support of the University of California Observatories and UCSC’s Lamat NSF REU program for funding this research. This work also benefited from the 2022 Exoplanet Summer Program in the Other Worlds Laboratory (OWL) at the University of California, Santa Cruz, a program funded by the Heising-Simons Foundation. Author B. Gerard thanks the 2018 SCExAO team for hosting discussions that led to the pupil chopping concept and the UCSC LAO group, particularly Dominic Sanchez, for discussions that led to the DM-based pupil chopping idea.

PY - 2022/8/29

Y1 - 2022/8/29

N2 - Ground-based high contrast imaging (HCI) and extreme adaptive optics (AO) technologies have advanced to the point of enabling direct detections of gas-giant exoplanets orbiting beyond the snow lines around nearby young star systems. However, leftover wavefront errors using current HCI and AO technologies, realized as “speckles” in the coronagraphic science image, still limit HCI instrument sensitivities to detecting and characterizing lowermass, closer-in, and/or older/colder exoplanetary systems. Improving the performance of AO wavefront sensors (WFSs) and control techniques is critical to improving such HCI instrument sensitivity. Here we present three different ongoing wavefront sensing and control project developments on the Santa cruz Extreme AO Laboratory (SEAL) testbed: (1) “multi-WFS single congugate AO (SCAO)” using the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST) and a Shack Hartmann WFS, (2) pupil chopping for focal plane wavefront sensing, first with an external amplitude modulator and then with the DM as a phase-only modulator, and (3) a laboratory demonstration of enhanced linearity with the non-modulated bright Pyramid WFS (PWFS) compared to the regular PWFS. All three topics share a common theme of multi-WFS SCAO and/or second stage AO, presenting opportunities and applications to further investigate these techniques in the future.

AB - Ground-based high contrast imaging (HCI) and extreme adaptive optics (AO) technologies have advanced to the point of enabling direct detections of gas-giant exoplanets orbiting beyond the snow lines around nearby young star systems. However, leftover wavefront errors using current HCI and AO technologies, realized as “speckles” in the coronagraphic science image, still limit HCI instrument sensitivities to detecting and characterizing lowermass, closer-in, and/or older/colder exoplanetary systems. Improving the performance of AO wavefront sensors (WFSs) and control techniques is critical to improving such HCI instrument sensitivity. Here we present three different ongoing wavefront sensing and control project developments on the Santa cruz Extreme AO Laboratory (SEAL) testbed: (1) “multi-WFS single congugate AO (SCAO)” using the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST) and a Shack Hartmann WFS, (2) pupil chopping for focal plane wavefront sensing, first with an external amplitude modulator and then with the DM as a phase-only modulator, and (3) a laboratory demonstration of enhanced linearity with the non-modulated bright Pyramid WFS (PWFS) compared to the regular PWFS. All three topics share a common theme of multi-WFS SCAO and/or second stage AO, presenting opportunities and applications to further investigate these techniques in the future.

UR - http://hdl.handle.net/10754/680212

UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12185/2630519/Various-wavefront-sensing-and-control-developments-on-the-Santa-Cruz/10.1117/12.2630519.full

U2 - 10.1117/12.2630519

DO - 10.1117/12.2630519

M3 - Conference contribution

BT - Adaptive Optics Systems VIII

PB - SPIE

ER -

Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed

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