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    Laboratory characterization of FIRSTv2 photonic chip for the study of substellar companions

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    Author
    Barjot, K.
    Huby, E.
    Vievard, S.
    Cvetojevic, N.
    Lacour, S.
    Martin, G.
    Deo, V.
    Lapeyrere, V.
    Rouan, D.
    Guyon, O.
    Lozi, J.
    Jovanovic, N.
    Cassagnettes, C.
    Perrin, G.
    Marchis, F.
    Duchêne, G.
    Kotani, T.
    Show allShow less
    Affiliation
    College of Optical Sciences, University of Arizona
    Issue Date
    2020
    Keywords
    Exoplanets
    High contrast imaging
    Interferometry
    Pupil remapping
    Single-mode fiber filtering
    
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    Show full item record
    Publisher
    SPIE
    Citation
    Barjot, K., Huby, E., Vievard, S., Cvetojevic, N., Lacour, S., Martin, G., ... & Kotani, T. (2020, December). Laboratory characterization of FIRSTv2 photonic chip for the study of substellar companions. In Optical and Infrared Interferometry and Imaging VII (Vol. 11446, p. 1144623). International Society for Optics and Photonics.
    Journal
    Proceedings of SPIE - The International Society for Optical Engineering
    Rights
    Copyright © 2020 SPIE.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    FIRST (Fibered Imager foR a Single Telescope instrument) is a post-AO instrument that enables high contrast imaging and spectroscopy at spatial scales below the diffraction limit. FIRST achieves sensitivity and accuracy by a unique combination of sparse aperture masking, spatial filtering by single-mode fibers and cross-dispersion in the visible. The telescope pupil is divided into sub-pupils by an array of microlenses, coupling the light into single-mode fibers. The output of the fibers are rearranged in a non redundant configuration, allowing the measurement of the complex visibility for every baseline over the 600-900 nm spectral range. A first version of this instrument is currently integrated to the Subaru Extreme AO bench (SCExAO). This paper focuses on the on-going instrument upgrades and testings, which aim at increasing the instrument's stability and sensitivity, thus improving the dynamic range. FIRSTv2's interferometric scheme is based on a photonic chip beam combiner. We report on the laboratory characterization of two different types of 5-input beam combiner with enhanced throughput. The interferometric recombination of each pair of sub-pupils is encoded on a single output. Thus, to sample the fringes we implemented a temporal phase modulation by pistoning the segmented mirrors of a Micro-ElectroMechanical System (MEMS). By coupling high angular resolution and spectral resolution in the visible, FIRST offers unique capabilities in the context of the detection and spectral characterization of close companions, especially on 30m-class telescopes. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
    Note
    Immediate access
    ISSN
    0277-786X
    ISBN
    9781510000000
    DOI
    10.1117/12.2561713
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2561713
    Scopus Count
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    UA Faculty Publications

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