13 citations · 15 across the 19 of their papers we have counts for
21 papers
On-sky results from REDWOODS, a platform at Lick/ShaneAO for testing second stage AO technologies
Benjamin L. Gerard, Dominic F. Sanchez, Aditya R. Sengupta +11
REDWOODS is a new sub-testbed within the Shane Adaptive Optics (AO) system at Lick observatory, developed to test second stage AO wavefront sensing and control technologies, includ…
Ground control to major time-lag: on-sky results of data-driven predictive wavefront control at Keck Observatory
Jules Fowler, Rebeca Jensen-Clem, Sylvain Cetre +12
Directly imaging and characterizing exoplanets requires extreme adaptive optics (XAO), which achieves exquisite wavefront correction over a small (<5") field of view. Temporal erro…
On-sky demonstration of reinforcement learning for adaptive optics control
Jalo Nousiainen, Vincent Chambouleyron, Benoit Neichel +7
Reinforcement learning (RL)-based algorithms have recently emerged as a promising approach for adaptive optics (AO) control. In simulations and laboratory experiments, they have de…
On-sky demonstration of second-stage wavefront control with a photonic lantern
Aditya R. Sengupta, Jordan Diaz, Matthew DeMartino +14
Ground-based direct imaging of exoplanets at high contrast requires precise correction of atmospheric turbulence using adaptive optics (AO). The planet-to-star contrast ratio at sm…
The Santa Cruz Extreme AO Lab (SEAL) 2.0: A reflective, multi-wavelength rebuild
Rebecca Jensen-Clem, Vincent Chambouleyron, Prince Javier +20
The Santa cruz Extreme Adaptive optics Lab (SEAL) is a visible/near-infrared wavelength testbed designed to support technology development for high contrast imaging on large, segme…
Exploring the Capabilities of Astrophotonics for the Precise Alignment of Segmented Telescopes
Maria Cuevas, Aditya R. Sengupta, Vincent Chambouleyron +9
The next generation of large telescopes for direct imaging of exoplanets will require segmented primary mirrors. Over both long and short timescales, these telescopes experience se…
Experimental validation of photonic lantern imaging and wavefront sensing performance
Aditya R. Sengupta, Vincent Chambouleyron, Jordan Diaz +15
Photonic lanterns (PLs) are fiber-based waveguides that are capable of focal-plane wavefront sensing while simultaneously directing light to downstream science instruments. The opt…
Developments on LLNL's high contrast testbed and Lick/ShaneAO
Benjamin L. Gerard, Dominic F. Sanchez, Aditya R. Sengupta +15
LLNL has recently setup a High Contrast Testbed (HCT) for AO and exoplanet imaging technology development. We present the various HCT technologies currently under development, incl…
Real-time control and data standardization on various telescopes and benches
Nour Skaf, Rebecca Jensen-Clem, Aaron Hunter +19
Real-time control (RTC) is pivotal for any Adaptive Optics (AO) system, including high-contrast imaging of exoplanets and circumstellar environments. It is the brain of the AO syst…
The future looks dark: improving high contrast imaging with hyper-parameter optimization for data-driven predictive wavefront control
J. Fowler, Rebecca Jensen-Clem, Maaike A. M. van Kooten +2
The direct imaging and characterization of exoplanets requires extreme adaptive optics (XAO), achieving exquisite wavefront correction (upwards of 90 Strehl) over a narrow fiel…
Photonic lantern wavefront reconstruction in a multi-wavefront sensor single-conjugate adaptive optics system
Aditya R. Sengupta, Jordan Diaz, Benjamin L. Gerard +6
Exoplanet direct imaging using adaptive optics (AO) is often limited by non-common path aberrations (NCPAs) and aberrations that are invisible to traditional pupil-plane wavefront…
Using the Gerchberg-Saxton algorithm to reconstruct non-modulated pyramid wavefront sensor measurements
Vincent Chambouleyron, Aditya Sengupta, Maïssa Salama +9
Adaptive optics (AO) is a technique to improve the resolution of ground-based telescopes by correcting, in real-time, optical aberrations due to atmospheric turbulence and the tele…
First laboratory demonstration of real-time multi-wavefront sensor single conjugate adaptive optics
Benjamin L. Gerard, Daren Dillon, Sylvain Cetre +1
Exoplanet imaging has thus far enabled studies of wide-orbit (10 AU) giant planet (2 Jupiter masses) formation and giant planet atmospheres, with future 30 meter-class Extrem…
High Speed Focal Plane Wavefront Sensing with an Optical Chopper
Benjamin L. Gerard, Daren Dillon, Sylvain Cetre +1
Focal plane wavefront sensing and control is a critical approach to reducing non-common path errors between the a conventional astronomical adaptive optics (AO) wavefront sensor (W…
Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed
Benjamin L. Gerard, Javier Perez-Soto, Vincent Chambouleyron +7
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 bey…
Laboratory Demonstration of Real-Time Focal Plane Wavefront Control of Residual Atmospheric Speckles
Benjamin L. Gerard, Daren Dillon, Sylvain Cetre +1
Current and future high contrast imaging instruments aim to detect exoplanets at closer orbital separations, lower masses, and/or older ages than their predecessors. However, conti…
Predictive wavefront control on Keck II adaptive optics bench: on-sky coronagraphic results
Maaike A. M. van Kooten, Rebecca Jensen-Clem Sylvain Cetre, Sam Ragland +3
The behavior of an adaptive optics (AO) system for ground-based high contrast imaging (HCI) dictates the achievable contrast of the instrument. In conditions where the coherence ti…
The Santa Cruz Extreme AO Lab (SEAL): Design and First Light
Rebecca Jensen-Clem, Daren Dillon, Benjamin Gerard +9
The Santa Cruz Extreme AO Lab (SEAL) is a new visible-wavelength testbed designed to advance the state of the art in wavefront control for high contrast imaging on large, segmented…
First Experimental Results of the Fast Atmospheric Self-coherent Camera Technique on the Santa cruz Extreme Adaptive optics Laboratory Testbed: Demonstration of High Speed Focal Plane Wavefront Control of Residual Atmospheric Speckles
Benjamin L. Gerard, Daren Dillon, Sylvain Cetre +3
Current and future high contrast imaging instruments aim to detect exoplanets at closer orbital separations, lower masses, and/or older ages than their predecessors, with the event…
Status of predictive wavefront control on Keck II adaptive optics bench: on-sky coronagraphic results
Maaike A. M. van Kooten, Rebecca Jensen-Clem, Sylvain Cetre +4
The behavior of an adaptive optics (AO) system for ground-based high contrast imaging (HCI) dictates the achievable contrast of the instrument. In conditions where the coherence ti…
Demonstrating predictive wavefront control with the Keck II near-infrared pyramid wavefront sensor
Rebecca Jensen-Clem, Charlotte Z. Bond, Sylvain Cetre +5
The success of ground-based instruments for high contrast exoplanet imaging depends on the degree to which adaptive optics (AO) systems can mitigate atmospheric turbulence. While m…