Presentation + Paper
1 September 2021 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, Rebecca Jensen-Clem, Thomas D. Yuzvinsky, Holger Schmidt
Author Affiliations +
Abstract
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 eventual goal of directly detecting terrestrial-mass habitable-zone exoplanets. However, continually evolving speckles in the coronagraphic science image still limit state-of-the-art ground-based exoplanet imaging instruments to contrasts at least two orders of magnitude worse than what is needed to achieve this goal. For ground-based adaptive optics (AO) instruments it remains challenging for most speckle suppression techniques to attenuate both the dynamic atmospheric and quasi-static instrumental speckles. We have proposed a focal plane wavefront sensing and control algorithm to address this challenge, called the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST), which enables the SCC to operate down to millisecond timescales even when only a few photons are detected per speckle. Here we present preliminary experimental results of FAST on the Santa Cruz Extreme AO Laboratory (SEAL) testbed, demonstrating closed-loop focal plane wavefront control on millisecond-timescales.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Benjamin L. Gerard, Daren Dillon, Sylvain Cetre, Rebecca Jensen-Clem, Thomas D. Yuzvinsky, and Holger Schmidt "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", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118231H (1 September 2021); https://doi.org/10.1117/12.2599556
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KEYWORDS
Coronagraphy

Wavefronts

Adaptive optics

Exoplanets

Point spread functions

Speckle

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