Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging

M. J. Wilby; C. U. Keller; S. Haffert; V. Korkiakoski; F. Snik; A. G.M. Pietrow

doi:10.1117/12.2231303

Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging

M. J. Wilby^*, C. U. Keller, S. Haffert, V. Korkiakoski, F. Snik, A. G.M. Pietrow

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

Non-Common Path Errors (NCPEs) are the dominant factor limiting the performance of current astronomical high-contrast imaging instruments. If uncorrected, the resulting quasi-static speckle noise floor limits coronagraph performance to a raw contrast of typically 10^-4, a value which does not improve with increasing integration time. The coronagraphic Modal Wavefront Sensor (cMWS) is a hybrid phase optic which uses holographic PSF copies to supply focal-plane wavefront sensing information directly from the science camera, whilst maintaining a bias-free coronagraphic PSF. This concept has already been successfully implemented on-sky at the William Herschel Telescope (WHT), La Palma, demonstrating both real-Time wavefront sensing capability and successful extraction of slowly varying wavefront errors under a dominant and rapidly changing atmospheric speckle foreground. In this work we present an overview of the development of the cMWS and recent first light results obtained using the Leiden EXoplanet Instrument (LEXI), a high-contrast imager and high-dispersion spectrograph pathfinder instrument for the WHT.

Original language	English
Title of host publication	Adaptive Optics Systems V
Editors	Enrico Marchetti, Jean-Pierre Veran, Laird M. Close
Publisher	SPIE
ISBN (Electronic)	9781510601970
DOIs	https://doi.org/10.1117/12.2231303
Publication status	Published - 2016
Event	Adaptive Optics Systems V - Edinburgh, United Kingdom Duration: 26 Jun 2016 → 1 Jul 2016

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9909
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Adaptive Optics Systems V
Country/Territory	United Kingdom
City	Edinburgh
Period	26/06/16 → 1/07/16

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10.1117/12.2231303

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Wilby, M. J., Keller, C. U., Haffert, S., Korkiakoski, V., Snik, F., & Pietrow, A. G. M. (2016). Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging. In E. Marchetti, J.-P. Veran, & L. M. Close (Eds.), Adaptive Optics Systems V Article 990921 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9909). SPIE. https://doi.org/10.1117/12.2231303

@inproceedings{c5887552f51b4d5fbfb0b5034a3c46a4,

title = "Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging",

abstract = "Non-Common Path Errors (NCPEs) are the dominant factor limiting the performance of current astronomical high-contrast imaging instruments. If uncorrected, the resulting quasi-static speckle noise floor limits coronagraph performance to a raw contrast of typically 10-4, a value which does not improve with increasing integration time. The coronagraphic Modal Wavefront Sensor (cMWS) is a hybrid phase optic which uses holographic PSF copies to supply focal-plane wavefront sensing information directly from the science camera, whilst maintaining a bias-free coronagraphic PSF. This concept has already been successfully implemented on-sky at the William Herschel Telescope (WHT), La Palma, demonstrating both real-Time wavefront sensing capability and successful extraction of slowly varying wavefront errors under a dominant and rapidly changing atmospheric speckle foreground. In this work we present an overview of the development of the cMWS and recent first light results obtained using the Leiden EXoplanet Instrument (LEXI), a high-contrast imager and high-dispersion spectrograph pathfinder instrument for the WHT.",

keywords = "Adaptive Optics, Focal-Plane Wavefront Sensing, High-Contrast Imaging, Holography, Non-Common Path Er-rors",

author = "Wilby, {M. J.} and Keller, {C. U.} and S. Haffert and V. Korkiakoski and F. Snik and Pietrow, {A. G.M.}",

note = "Publisher Copyright: {\textcopyright} 2016 SPIE.; Adaptive Optics Systems V ; Conference date: 26-06-2016 Through 01-07-2016",

year = "2016",

doi = "10.1117/12.2231303",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

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editor = "Enrico Marchetti and Jean-Pierre Veran and Close, {Laird M.}",

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Wilby, MJ, Keller, CU, Haffert, S, Korkiakoski, V, Snik, F & Pietrow, AGM 2016, Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging. in E Marchetti, J-P Veran & LM Close (eds), Adaptive Optics Systems V., 990921, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9909, SPIE, Adaptive Optics Systems V, Edinburgh, United Kingdom, 26/06/16. https://doi.org/10.1117/12.2231303

Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging. / Wilby, M. J.; Keller, C. U.; Haffert, S. et al.
Adaptive Optics Systems V. ed. / Enrico Marchetti; Jean-Pierre Veran; Laird M. Close. SPIE, 2016. 990921 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9909).

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

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AU - Haffert, S.

AU - Korkiakoski, V.

AU - Snik, F.

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N2 - Non-Common Path Errors (NCPEs) are the dominant factor limiting the performance of current astronomical high-contrast imaging instruments. If uncorrected, the resulting quasi-static speckle noise floor limits coronagraph performance to a raw contrast of typically 10-4, a value which does not improve with increasing integration time. The coronagraphic Modal Wavefront Sensor (cMWS) is a hybrid phase optic which uses holographic PSF copies to supply focal-plane wavefront sensing information directly from the science camera, whilst maintaining a bias-free coronagraphic PSF. This concept has already been successfully implemented on-sky at the William Herschel Telescope (WHT), La Palma, demonstrating both real-Time wavefront sensing capability and successful extraction of slowly varying wavefront errors under a dominant and rapidly changing atmospheric speckle foreground. In this work we present an overview of the development of the cMWS and recent first light results obtained using the Leiden EXoplanet Instrument (LEXI), a high-contrast imager and high-dispersion spectrograph pathfinder instrument for the WHT.

AB - Non-Common Path Errors (NCPEs) are the dominant factor limiting the performance of current astronomical high-contrast imaging instruments. If uncorrected, the resulting quasi-static speckle noise floor limits coronagraph performance to a raw contrast of typically 10-4, a value which does not improve with increasing integration time. The coronagraphic Modal Wavefront Sensor (cMWS) is a hybrid phase optic which uses holographic PSF copies to supply focal-plane wavefront sensing information directly from the science camera, whilst maintaining a bias-free coronagraphic PSF. This concept has already been successfully implemented on-sky at the William Herschel Telescope (WHT), La Palma, demonstrating both real-Time wavefront sensing capability and successful extraction of slowly varying wavefront errors under a dominant and rapidly changing atmospheric speckle foreground. In this work we present an overview of the development of the cMWS and recent first light results obtained using the Leiden EXoplanet Instrument (LEXI), a high-contrast imager and high-dispersion spectrograph pathfinder instrument for the WHT.

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M3 - Conference contribution

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Adaptive Optics Systems V

A2 - Marchetti, Enrico

A2 - Veran, Jean-Pierre

A2 - Close, Laird M.

PB - SPIE

Y2 - 26 June 2016 through 1 July 2016

ER -

Wilby MJ, Keller CU, Haffert S, Korkiakoski V, Snik F, Pietrow AGM. Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging. In Marchetti E, Veran JP, Close LM, editors, Adaptive Optics Systems V. SPIE. 2016. 990921. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2231303

Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging

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