Deployment of focal plane WFS technologies on 8-m telescopes: from the Subaru SPIDERS pathfinder, to the facility-class GPI 2.0 CAL2 system

Christian Marois; Olivier Lardière; William Thompson; Garima Singh; Adam Johnson; Tim Hardy; Joeleff Fitzsimmons; Benjamin L. Gerard; Suresh Sivanandam; Simon Thibault; Dmitry Savransky; Colin Bradley; Rebecca Jensen-Clem; Mathieu Demers; Qiang Fu; Wolfgang Heidrich; Mamadou N'Diaye

doi:10.1117/12.2630564

29 August 2022 Deployment of focal plane WFS technologies on 8-m telescopes: from the Subaru SPIDERS pathfinder, to the facility-class GPI 2.0 CAL2 system

Christian Marois, Olivier Lardière, William Thompson, Garima Singh, Adam Johnson, Tim Hardy, Joeleff Fitzsimmons, Benjamin L. Gerard, Suresh Sivanandam, Simon Thibault, Dmitry Savransky, Colin Bradley, Rebecca Jensen-Clem, Mathieu Demers, Qiang Fu, Wolfgang Heidrich, Mamadou N'Diaye

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121851Y (2022) https://doi.org/10.1117/12.2630564
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Facility-class high-contrast exoplanet imaging systems are currently limited by non-common path quasi-static speckles. Due to these aberrations, the raw contrast saturates after a few seconds. Several active wavefront correction techniques have been developed to remove this noise, with limited success. The NRC Canada is funding two projects, the SPIDERS pathfinder at the Subaru telescope (ETA 2023), and the CAL2 upgrade of the Gemini Planet Imager-2 (ETA 2024), to deploy a modified self-coherent camera (based on FAST) to measure the focal plane electric field, and to apply wavefront corrections in a closed-loop down to 10s of ms in a narrow band. The CAL2 project will focus on developing a facilityclass focal plane & Lyot-stop Low-order sensors using a CRED2 and a SAPHIRA-based camera, reaching up to a gain of 100x in contrast for bright stars. The SPIDERS pathfinder will have a similar configuration with the addition of an imaging Fourier transform spectrograph, allowing the acquisition of a 3.3” diagonal FOV to up to R-20,000 in the NIR to perform advanced spectral differential imaging at a high-spectral resolution to search and characterize exoplanets. These projects will serve as the foundation to develop similar systems for future ground-/space-based telescopes, and be an important step toward the development of instruments to search for life signatures in the atmosphere of exoplanets.

Conference Presentation

Citation Download Citation

Christian Marois, Olivier Lardière, William Thompson, Garima Singh, Adam Johnson, Tim Hardy, Joeleff Fitzsimmons, Benjamin L. Gerard, Suresh Sivanandam, Simon Thibault, Dmitry Savransky, Colin Bradley, Rebecca Jensen-Clem, Mathieu Demers, Qiang Fu, Wolfgang Heidrich, and Mamadou N'Diaye "Deployment of focal plane WFS technologies on 8-m telescopes: from the Subaru SPIDERS pathfinder, to the facility-class GPI 2.0 CAL2 system", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121851Y (29 August 2022); https://doi.org/10.1117/12.2630564

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available