Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm

William Thompson; Christian Marois; Garima Singh; Olivier Lardiere; Benjamin Gerard; Qiang Fu; Wolfgang Heidrich

doi:10.1117/12.2630415

Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm

William Thompson, Christian Marois, Garima Singh, Olivier Lardiere, Benjamin Gerard, Qiang Fu, Wolfgang Heidrich

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

In order to detect low mass and mature planets inwards of approximately 5 AU, future direct imaging instruments will require precision wavefront control that operates at relatively high speed. The self-coherent camera (SCC) is a promising technique for measuring the wavefront from science images at the focal plane. We present here results from NRC’s NEW-EARTH lab testing of the Fast Atmospheric SCC Technique, a variant of the SCC and its integration with a Lyot-stop Low-Order Wavefront Sensor. We demonstrate correction of quasi-static speckles in a half dark hole reaching raw 1σ contrasts on the order of 5 × 10−7 at 10 λ/D. We also present a simplified process for extracting measurements and/or DM commands from SCC images using a single matrixvector multiply. This testing and development are important steps on the way to the upcoming Subaru Pathfinder Instrument for Detection of Exoplanets and Removal of Speckles and the Gemini Planet Imager’s CAL2 upgrade.

Original language	English (US)
Title of host publication	Adaptive Optics Systems VIII
Publisher	SPIE
DOIs	https://doi.org/10.1117/12.2630415
State	Published - Aug 29 2022

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https://repository.kaust.edu.sa/bitstream/10754/685142/1/121852C_removed.pdf

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@inproceedings{835608810b794fb6b11768f272ef6f6a,

title = "Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm",

abstract = "In order to detect low mass and mature planets inwards of approximately 5 AU, future direct imaging instruments will require precision wavefront control that operates at relatively high speed. The self-coherent camera (SCC) is a promising technique for measuring the wavefront from science images at the focal plane. We present here results from NRC{\textquoteright}s NEW-EARTH lab testing of the Fast Atmospheric SCC Technique, a variant of the SCC and its integration with a Lyot-stop Low-Order Wavefront Sensor. We demonstrate correction of quasi-static speckles in a half dark hole reaching raw 1σ contrasts on the order of 5 × 10−7 at 10 λ/D. We also present a simplified process for extracting measurements and/or DM commands from SCC images using a single matrixvector multiply. This testing and development are important steps on the way to the upcoming Subaru Pathfinder Instrument for Detection of Exoplanets and Removal of Speckles and the Gemini Planet Imager{\textquoteright}s CAL2 upgrade.",

author = "William Thompson and Christian Marois and Garima Singh and Olivier Lardiere and Benjamin Gerard and Qiang Fu and Wolfgang Heidrich",

note = "KAUST Repository Item: Exported on 2022-10-25 Acknowledgements: We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), 466479467. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency. The authors are grateful to have performed this work on the traditional territories of the Coast Salish and Lekwungen-speaking peoples of Vancouver Island.",

year = "2022",

month = aug,

day = "29",

doi = "10.1117/12.2630415",

language = "English (US)",

booktitle = "Adaptive Optics Systems VIII",

publisher = "SPIE",

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T1 - Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm

AU - Thompson, William

AU - Marois, Christian

AU - Singh, Garima

AU - Lardiere, Olivier

AU - Gerard, Benjamin

AU - Fu, Qiang

AU - Heidrich, Wolfgang

N1 - KAUST Repository Item: Exported on 2022-10-25 Acknowledgements: We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), 466479467. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency. The authors are grateful to have performed this work on the traditional territories of the Coast Salish and Lekwungen-speaking peoples of Vancouver Island.

PY - 2022/8/29

Y1 - 2022/8/29

N2 - In order to detect low mass and mature planets inwards of approximately 5 AU, future direct imaging instruments will require precision wavefront control that operates at relatively high speed. The self-coherent camera (SCC) is a promising technique for measuring the wavefront from science images at the focal plane. We present here results from NRC’s NEW-EARTH lab testing of the Fast Atmospheric SCC Technique, a variant of the SCC and its integration with a Lyot-stop Low-Order Wavefront Sensor. We demonstrate correction of quasi-static speckles in a half dark hole reaching raw 1σ contrasts on the order of 5 × 10−7 at 10 λ/D. We also present a simplified process for extracting measurements and/or DM commands from SCC images using a single matrixvector multiply. This testing and development are important steps on the way to the upcoming Subaru Pathfinder Instrument for Detection of Exoplanets and Removal of Speckles and the Gemini Planet Imager’s CAL2 upgrade.

AB - In order to detect low mass and mature planets inwards of approximately 5 AU, future direct imaging instruments will require precision wavefront control that operates at relatively high speed. The self-coherent camera (SCC) is a promising technique for measuring the wavefront from science images at the focal plane. We present here results from NRC’s NEW-EARTH lab testing of the Fast Atmospheric SCC Technique, a variant of the SCC and its integration with a Lyot-stop Low-Order Wavefront Sensor. We demonstrate correction of quasi-static speckles in a half dark hole reaching raw 1σ contrasts on the order of 5 × 10−7 at 10 λ/D. We also present a simplified process for extracting measurements and/or DM commands from SCC images using a single matrixvector multiply. This testing and development are important steps on the way to the upcoming Subaru Pathfinder Instrument for Detection of Exoplanets and Removal of Speckles and the Gemini Planet Imager’s CAL2 upgrade.

UR - http://hdl.handle.net/10754/685142

UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12185/2630415/Performance-of-the-FAST-self-coherent-camera-at-the-NEW/10.1117/12.2630415.full

U2 - 10.1117/12.2630415

DO - 10.1117/12.2630415

M3 - Conference contribution

BT - Adaptive Optics Systems VIII

PB - SPIE

ER -

Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm

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