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Proceedings Article

An end-to-end polychromatic Fresnel propagation model of GPI

[+] Author Affiliations
Christian Marois

Herzberg Institute of Astrophysics (Canada) and Lawrence Livermore National Lab. (USA)

Bruce Macintosh, Lisa Poyneer, Brian Bauman

Lawrence Livermore National Lab. (USA)

Rémi Soummer

American Museum of Natural History (USA)

Proc. SPIE 7015, Adaptive Optics Systems, 70151T (July 12, 2008); doi:10.1117/12.789899
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From Conference Volume 7015

  • Adaptive Optics Systems
  • Norbert Hubin; Claire E. Max; Peter L. Wizinowich
  • Marseille, France | June 23, 2008

abstract

The Gemini Planet Imager (GPI) is a future high-order coronagraphic adaptive optics system optimized for the search and analysis of Jupiter-like exoplanets around nearby young 10-1000Myr stars. In this paper, an on-axis Fresnel wavefront propagation model of GPI is presented. The main goal of this work is to confirm that the current GPI design will reach its 10-7 contrast requirement. The model, assembled using the PROPER IDL library, is used to properly simulate out-of-pupil-plane and finite size optics. A spectral data cube at GPI spectral resolution R=45 in H-band is obtained to estimate the GPI contrast as a function of wavelength. This cube is then used to evaluate the speckle suppression performance of the Simultaneous Spectral Differential Imaging (SSDI) technique. It is shown that GPI should achieve a photon noise limited 10-7 contrast when using a simple SSDI post-processing on an H=5 star and a 1h observing sequence. Finally, a long exposure data cube is obtained by combining the speckle contributions of an average atmosphere and GPI optics. That final long-exposure contrast as a function of wavelength can be used to estimate the GPI exoplanet characterization accuracy, and to evaluate, using Monte-Carlo simulations, the expected exoplanet survey performance.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Christian Marois ; Bruce Macintosh ; Rémi Soummer ; Lisa Poyneer and Brian Bauman
"An end-to-end polychromatic Fresnel propagation model of GPI", Proc. SPIE 7015, Adaptive Optics Systems, 70151T (July 12, 2008); doi:10.1117/12.789899; http://dx.doi.org/10.1117/12.789899


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