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Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM^2 coronagraph

Bourget, P. and Mawet, D. and Mardones, P. and Schuhler, N. and Pueyo, L. and Girard, J. and Haguenauer, P. and Gonte, F. (2013) Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM^2 coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets VI. Proceedings of SPIE. No.8864. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 88640J. ISBN 9780819497147. https://resolver.caltech.edu/CaltechAUTHORS:20180618-144401710

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Abstract

We present a new Adaptive Phase Mask (APM) coronagraph design enabling Amplitude and Phase Modulation control (APM). The Adaptive Phase mask coronagraph is a technique proposed to provide both high dynamic and high angular resolution imaging of faint sources around bright objects. Discriminating faint sources from static speckles is a challenging problem. Our new system is based on synchronous demodulation that allows high dynamic range detection of a faint target immersed in a background. The APM^2 uses the coherence of speckles to discriminate them from proper companions, using the mask itself as the electric field modulator. Synchronous detection in the radio frequency range is used to side-step the effect of atmospheric turbulence and enable the detection of low amplitude signals. The APM^2 concept offers high dynamic range detection and provides a time- and cost-effective method to quantify the probability of presence of a faint object close to the central star.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2026211DOIArticle
ORCID:
AuthorORCID
Mawet, D.0000-0002-8895-4735
Pueyo, L.0000-0003-3818-408X
Girard, J.0000-0001-8627-0404
Alternate Title:Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM2 coronagraph
Additional Information:© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).
Subject Keywords:High-contrast imaging, coronagraphy, polarization, high angular resolution, phase mask, adaptive optics, synchronous detection
Series Name:Proceedings of SPIE
Issue or Number:8864
DOI:10.1117/12.2026211
Record Number:CaltechAUTHORS:20180618-144401710
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180618-144401710
Official Citation:P. Bourget, D. Mawet, P. Mardones, N. Schuhler, L. Pueyo, J. Girard, P. Haguenauer, F. Gonte, "Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM2 coronagraph", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640J (26 September 2013); doi: 10.1117/12.2026211; https://doi.org/10.1117/12.2026211
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87200
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:18 Jun 2018 22:12
Last Modified:15 Nov 2021 20:46

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