Ms. Kathryn St. Laurent Profile

Kathryn St. Laurent

at Space Telescope Science Institute

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 27 August 2022 Poster + Paper

APLC-optimization: an apodized pupil Lyot coronagraph design survey toolkit

Bryony Nickson, Emiel Por, Meiji Nguyen, Rémi Soummer, Iva Laginja, Ananya Sahoo, Laurent Pueyo, Katheryn St. Laurent, Mamadou N’Diaye, Neil Zimmerman, James Noss, Marshall Perrin

Proceedings Volume 12180, 121805K (2022) https://doi.org/10.1117/12.2630686

KEYWORDS: Apodization, Exoplanets, Optical design software, Optimization (mathematics), Design and modelling, Coronagraphy, Telescopes, Tolerancing, Image segmentation, Optical instrument design, Gemini Planet Imager, Point spread functions, Error analysis, Space telescopes, Software development

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Proceedings Article | 15 December 2020 Poster + Paper

Exploiting symmetries and progressive refinement for apodized pupil Lyot coronagraph design

Emiel Por, Rémi Soummer, James Noss, Kathryn St. Laurent

Proceedings Volume 11443, 114433P (2020) https://doi.org/10.1117/12.2562571

KEYWORDS: Coronagraphy, Optimization (mathematics), Optical instrument design, Space telescopes, Telescopes, Mirrors, Manufacturing

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Proceedings Article | 9 September 2019 Presentation

High-contrast imager for complex aperture telescopes (HiCAT): 6. Two deformable mirror wavefront control (Conference Presentation)

Rémi Soummer, Iva Laginja, Scott Will, Roser Juanola-Parramon, Peter Petrone, Greg Brady, James Noss, Marshall Perrin, Julia Fowler, Heather Kurtz, Kathryn St. Laurent, Kevin Fogarty, Evelyn McChesney, Nathan Scott, Keira Brooks, Thomas Comeau, Marc Ferrari, Rob Gontrum, John Hagopian, Emmanuel Hugot, Lucie Leboulleux, Johan Mazoyer, Laurent Mugnier, Mamadou N'Diaye, Laurent Pueyo, Jean-François Sauvage, Ron Shiri, Anand Sivaramakrishnan, Ana-Maria Valenzuela, Neil Zimmerman

Proceedings Volume 11117, 111171Y (2019) https://doi.org/10.1117/12.2530299

KEYWORDS: Telescopes, Deformable mirrors, Imaging systems, Wavefronts, Wavefront sensors, Coronagraphy, Cameras, Ultraviolet telescopes, Image segmentation, Space telescopes

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Proceedings Article | 9 September 2019 Presentation + Paper

Wavefront error tolerancing for direct imaging of exo-Earths with a large segmented telescope in space

Iva Laginja, Lucie Leboulleux, Laurent Pueyo, Rémi Soummer, Jean-François Sauvage, Laurent Mugnier, Laura Coyle, J. Scott Knight, Kathryn St. Laurent, Emiel Por, James Noss

Proceedings Volume 11117, 1111717 (2019) https://doi.org/10.1117/12.2530300

KEYWORDS: Space telescopes, Wavefronts, Image segmentation, Telescopes, Coronagraphy, Instrument modeling, Planets, Space operations, Wavefront sensors, Computer simulations

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SPIE Journal Paper | 20 May 2019

ExoEarth yield landscape for future direct imaging space telescopes

Christopher Stark, Rus Belikov, Matthew Bolcar, Eric Cady, Brendan Crill, Steve Ertel, Tyler Groff, Sergi Hildebrandt, John Krist, P. Douglas Lisman, Johan Mazoyer, Bertrand Mennesson, Bijan Nemati, Laurent Pueyo, Bernard Rauscher, A. J. Riggs, Garreth Ruane, Stuart Shaklan, Dan Sirbu, Rémi Soummer, Kathryn St. Laurent, Neil Zimmerman

JATIS, Vol. 5, Issue 02, 024009, (May 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.2.024009

KEYWORDS: Coronagraphy, Stars, Telescopes, Planets, Space telescopes, Optical instrument design, Point spread functions, Mirrors, Exoplanets, Sensors

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Proceedings Article | 21 August 2018 Presentation + Paper

Optimal deformable mirror and pupil apodization combinations for apodized pupil Lyot coronagraphs with obstructed pupils

Kevin Fogarty, Johan Mazoyer, Kathryn St. Laurent, Rémi Soummer, Mamadou N'Diaye, Chris Stark, Laurent Pueyo

Proceedings Volume 10698, 106981J (2018) https://doi.org/10.1117/12.2314394

KEYWORDS: Coronagraphy, Apodization, Space telescopes, Exoplanets, Stars, Telescopes, Deformable mirrors, Planets

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Proceedings Article | 21 August 2018 Presentation + Paper

High-contrast imager for complex aperture telescopes (HiCAT): 5. first results with segmented-aperture coronagraph and wavefront control

Rémi Soummer, Gregory Brady, Keira Brooks, Thomas Comeau, Élodie Choquet, Tom Dillon, Sylvain Egron, Rob Gontrum, John Hagopian, Iva Laginja, Lucie Leboulleux, Marshall Perrin, Peter Petrone, Laurent Pueyo, Johan Mazoyer, Mamadou N'Diaye, A. J. Eldorado Riggs, Ron Shiri, Anand Sivaramakrishnan, Kathryn St. Laurent, Ana-Maria Valenzuela, Neil Zimmerman

Proceedings Volume 10698, 106981O (2018) https://doi.org/10.1117/12.2314110

KEYWORDS: Coronagraphy, Space telescopes, Wavefronts, Telescopes, Metrology, Phase retrieval, Carbon nanotubes

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Segmented telescopes are a possible approach to enable large-aperture space telescopes for the direct imaging and spectroscopy of habitable worlds. However, the increased complexity of their aperture geometry, due to the central obstruction, support structures and segment gaps, makes high-contrast imaging very challenging. The High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed was designed to study and develop solutions for such telescope pupils using wavefront control and coronagraphic starlight suppression. The testbed design has the flexibility to enable studies with increasing complexity for telescope aperture geometries starting with off-axis telescopes, then on-axis telescopes with central obstruction and support structures - e.g. the Wide Field Infrared Survey Telescope (WFIRST) - up to on-axis segmented telescopes, including various concepts for a Large UV, Optical, IR telescope (LUVOIR). In the past year, HiCAT has made significant hardware and software updates in order to accelerate the development of the project. In addition to completely overhauling the software that runs the testbed, we have completed several hardware upgrades, including the second and third deformable mirror, and the first custom Apodized Pupil Lyot Coronagraph (APLC) optimized for the HiCAT aperture, which is similar to one of the possible geometries considered for LUVOIR. The testbed also includes several external metrology features for rapid replacement of parts, and in particular the ability to test multiple apodizers readily, an active tip-tilt control system to compensate for local vibration and air turbulence in the enclosure. On the software and operations side, the software infrastructure enables 24/7 automated experiments that include routine calibration tasks and high-contrast experiments. In this communication we present an overview and status update of the project, both on the hardware and software side, and describe the results obtained with APLC wavefront control.

Proceedings Article | 21 August 2018 Paper

Apodized Pupil Lyot coronagraphs with arbitrary aperture telescopes: novel designs using hybrid focal plane masks

Mamadou N'Diaye, Kevin Fogarty, Rémi Soummer, Alexis Carlotti, Kjetil Dohlen, Johan Mazoyer, Laurent Pueyo, Kathryn St. Laurent, Neil Zimmerman

Proceedings Volume 10698, 106986A (2018) https://doi.org/10.1117/12.2313225

KEYWORDS: Coronagraphy, Space telescopes, Stars, Planets, Telescopes, Exoplanets, Apodization, Imaging systems, Optical instrument design

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Proceedings Article | 16 July 2018 Paper

Apodized pupil Lyot coronagraphs designs for future segmented space telescopes

Kathryn St. Laurent, Kevin Fogarty, Neil Zimmerman, Mamadou N'Diaye, Christopher Stark, Johan Mazoyer, Anand Sivaramakrishnan, Laurent Pueyo, Stuart Shaklan, Robert Vanderbei, Rémi Soummer

Proceedings Volume 10698, 106982W (2018) https://doi.org/10.1117/12.2313902

KEYWORDS: Coronagraphy, Telescopes, Space telescopes, Optical instrument design, Stars, Mirrors, Exoplanets, Planets, Wavefronts

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Proceedings Article | 13 September 2017 Presentation + Paper

The LUVOIR architecture "A" coronagraph instrument

L. Pueyo, N. Zimmerman, M. Bolcar, T. Groff, C. Stark, G. Ruane, J. Jewell, R. Soummer, K. St. Laurent, J. Wang, D. Redding, J. Mazoyer, K. Fogarty, Roser Juanola-Parramon, S. Domagal-Goldman, A. Roberge, O. Guyon, A. Mandell

Proceedings Volume 10398, 103980F (2017) https://doi.org/10.1117/12.2274654

KEYWORDS: Coronagraphy, Wavefronts, Sensors, Planets, Channel projecting optics, Wavefront sensors, Stars, Imaging systems, Mirrors, Telescopes

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In preparation for the Astro 2020 Decadal Survey NASA has commissioned the study four flagship missions spanning to a wide range of observable wavelengths: the Origins Space Telescope (OST, formerly the Far-Infrared Surveyor), Lynx (formerly the X-ray Surveyor), the Large UV/Optical/Infrared Surveyor (LUVOIR) and the Habitable Exoplanet Imager (HabEx). One of the key scientific objectives of the latter two is the detection and characterization of the earth-like planets around nearby stars using the direct imaging technique (along with a broad range of investigations regarding the architecture of and atmospheric composition exoplanetary systems using this technique). As a consequence dedicated exoplanet instruments are being studied for these mission concepts. This paper discusses the design of the coronagraph instrument for the architecture “A” (15 meters aperture) of LUVOIR. The material presented in this paper is aimed at providing an overview of the LUVOIR coronagraph instrument. It is the result of four months of discussions with various community stakeholders (scientists and technologists) regarding the instrument’s basic parameters followed by meticulous design work by the the GSFC Instrument Design Laboratory team. In the first section we review the main science drivers, presents the overall parameters of the instrument (general architecture and backend instrument) and delve into the details of the currently envisioned coronagraph masks along with a description of the wavefront control architecture. Throughout the manuscript we describe the trades we made during the design process. Because the vocation of this study is to provide a baseline design for the most ambitious earth-like finding instrument that could be possibly launched into the 2030’s, we have designed an complex system privileged that meets the ambitious science goals out team was chartered by the LUVOIR STDT exoplanet Working Group. However in an effort to minimize technological risk we tried to maximize the number of technologies that will be matured by the WFIRST coronagraph instruments.

Proceedings Article | 1 September 2017 Presentation + Paper

Sensitivity analysis for high-contrast missions with segmented telescopes

Lucie Leboulleux, Jean-François Sauvage, Laurent Pueyo, Thierry Fusco, Rémi Soummer, Mamadou N'Diaye, Kathryn St. Laurent

Proceedings Volume 10400, 104000M (2017) https://doi.org/10.1117/12.2274347

KEYWORDS: Image segmentation, Space telescopes, Telescopes, Imaging spectroscopy, Wavefronts, Exoplanets, Coronagraphy, Spectroscopy, Planets, Systems modeling

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Proceedings Article | 29 July 2016 Paper

Lyot coronagraph design study for large, segmented space telescope apertures

Neil Zimmerman, Mamadou N'Diaye, Kathryn St. Laurent, Rémi Soummer, Laurent Pueyo, Christopher Stark, Anand Sivaramakrishnan, Marshall Perrin, Robert Vanderbei, N. Kasdin, Stuart Shaklan, Alexis Carlotti

Proceedings Volume 9904, 99041Y (2016) https://doi.org/10.1117/12.2233205

KEYWORDS: Space telescopes, Image segmentation, Exoplanets, Optical instrument design, Telescopes, Image segmentation, Coronagraphy, Point spread functions, Tolerancing, Binary data, Apodization

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Showing 5 of 12 publications

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