High contrast imaging at the photon noise limit with self-calibrating WFS/C systems

Olivier Guyon, Barnaby Norris, Marc Antoine Martinod, Kyohoon Ahn, Peter Tuthill, Jared Males, Alison Wong, Nour Skaf, Thayne Currie, Kelsey Miller, Steven Bos, Julien Lozi, Vincent Deo, Sebastien Vievard, Ruslan Belikov, Kyle Van Gorkom, Sebastiaan Haffert, Benjamin Mazin, Michael Bottom, Richard FrazinAlexander Rodack, Tyler Groff, Nemanja Jovanovic, Frantz Martinache

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


High contrast imaging (HCI) systems rely on active wavefront control (WFC) to deliver deep raw contrast in the focal plane, and on calibration techniques to further enhance contrast by identifying planet light within the residual speckle halo. Both functions can be combined in an HCI system and we discuss a path toward designing HCI systems capable of calibrating residual starlight at the fundamental contrast limit imposed by photon noise. We highlight the value of deploying multiple high-efficiency wavefront sensors (WFSs) covering a wide spectral range and spanning multiple optical locations. We show how their combined information can be leveraged to simultaneously improve WFS sensitivity and residual starlight calibration, ideally making it impossible for an image plane speckle to hide from WFS telemetry. We demonstrate residual starlight calibration in the laboratory and on-sky, using both a coronagraphic setup, and a nulling spectro-interferometer. In both case, we show that bright starlight can calibrate residual starlight.

Original languageEnglish (US)
Title of host publicationTechniques and Instrumentation for Detection of Exoplanets X
EditorsStuart B. Shaklan, Garreth J. Ruane
ISBN (Electronic)9781510644847
StatePublished - 2021
EventTechniques and Instrumentation for Detection of Exoplanets X 2021 - San Diego, United States
Duration: Aug 1 2021Aug 5 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering


ConferenceTechniques and Instrumentation for Detection of Exoplanets X 2021
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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