Focal plane wavefront control for the Gemini Planet Imager 2.0 calibration system (CAL2)

Duan Li; William Thompson; Dmitry Savransky; Christian Marois

doi:10.1117/12.2677478

5 October 2023 Focal plane wavefront control for the Gemini Planet Imager 2.0 calibration system (CAL2)

Duan Li, William Thompson, Dmitry Savransky, Christian Marois

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 1268014 (2023) https://doi.org/10.1117/12.2677478
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The Gemini Planet Imager’s performance was limited by speckle noise from post-coronagraph aberrations and internal optical imperfections. As part of the GPI 2.0 calibration unit upgrade, we demonstrate closed loop focal plane wavefront sensing and control techniques to enable higher contrast and smaller inner working angles. We present the experimental results of the classical speckle nulling method on a self-coherent camera, with contrast improvement by up to a factor of 3.2.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Duan Li, William Thompson, Dmitry Savransky, and Christian Marois "Focal plane wavefront control for the Gemini Planet Imager 2.0 calibration system (CAL2)", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 1268014 (5 October 2023); https://doi.org/10.1117/12.2677478

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