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Novel implementation of a Kalman filter for speckle nulling with a fiber injection unit

Zhang, Manxuan and Llop Sayson, Jorge and Jovanovic, Nemanja and Mawet, Dimitri and Xin, Yeyuan (2019) Novel implementation of a Kalman filter for speckle nulling with a fiber injection unit. In: Techniques and Instrumentation for Detection of Exoplanets IX. Proceedings of SPIE. No.11117. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 111171X. ISBN 9781510629271. https://resolver.caltech.edu/CaltechAUTHORS:20190912-132937281

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Abstract

High dispersion coronagraphy (HDC) is a technique that combines high contrast imaging techniques with high spectral resolution spectroscopy to directly characterize exoplanets and provide key information such as chemical composition, temperature, and rotational velocity. A consequence of adaptive optics systems used in direct imaging is the formation of residual bright spots of star lights, called speckles, in the final image. Due to the large difference in brightness between host stars and their planets, these speckles can easily obscure potential exoplanets. In a previous demonstration, it was shown that using monochromatic light and a fiber injection unit (FIU), simulated exoplanet light can be directed to a high-resolution spectrograph. The method had speckle suppression that exceeding conventional image-based speckle nulling. With a previous Kalman filter estimator implementation, we found that with the implementation of the algorithm, speckle suppression was even more stable and outperformed traditional speckle nulling. In this update to the estimator, progress has been made in terms of a new filter design, and better estimates of the physical parameters in the laboratory, resulting in a higher speckle nulling performance.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2530756DOIArticle
ORCID:
AuthorORCID
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Group:Astronomy Department
Subject Keywords:Vortex Coronagraph, Fiber Injection Unit, Speckle Nulling, Kalman Filter, Spectrograph, Exoplanet Characterization, Starlight-Suppression, High-Contrast Imaging
Series Name:Proceedings of SPIE
Issue or Number:11117
Record Number:CaltechAUTHORS:20190912-132937281
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190912-132937281
Official Citation:Manxuan Zhang, Jorge Llop Sayson, Nemanja Jovanovic, Dimitri Mawet, and Yeyuan Xin "Novel implementation of a Kalman filter for speckle nulling with a fiber injection unit", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171X (10 September 2019); https://doi.org/10.1117/12.2530756
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98614
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Sep 2019 21:59
Last Modified:03 Oct 2019 21:42

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