Diffraction-limited integral-field spectroscopy for extreme adaptive optics systems with the multicore fiber-fed integral-field unit
Journal of Astronomical Telescopes Instruments and Systems, vol. 6, pp. 1–24
Abstract
Direct imaging instruments have the spatial resolution to resolve exoplanets from their host star. This enables direct characterization of the exoplanets atmosphere, but most direct imaging instruments do not have spectrographs with high enough resolving power for detailed atmospheric characterization. We investigate the use of a single-mode diffraction-limited integral-field unit that is compact and easy to integrate into current and future direct imaging instruments for exoplanet characterization. This achieved by making use of recent progress in photonic manufacturing to create a single-mode fiber-fed image reformatter. The fiber link is created with three-dimensional printed lenses on top of a single-mode multicore fiber that feeds an ultrafast laser inscribed photonic chip that reformats the fiber into a pseudoslit. We then couple it to a first-order spectrograph with a triple stacked volume phase holographic grating for a high efficiency over a large bandwidth. The prototype system has had a successful first-light observing run at the 4.2-m William Herschel Telescope. The measured on-sky resolving power is between 2500 and 3000, depending on the wavelength. With our observations, we show that single-mode integral-field spectroscopy is a viable option for current and future exoplanet imaging instruments.
Authors 33
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Leiden University · University of Arizona
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Leiden Univ
University of Arizona
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Robert J. Harris corresponding
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Landessternwarte Heidelberg, Zentrum für Astronomie der Univ. Heidelberg
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Brera Astronomical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF - Osservatorio Astronomico di Brera
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Affiliation as printed
Heriot-Watt Univ
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Brera Astronomical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF - Osservatorio Astronomico di Brera
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Brera Astronomical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF - Osservatorio Astronomico di Brera
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Affiliation as printed
Heriot-Watt Univ
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Heriot-Watt Univ
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Heriot-Watt Univ
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Univ. of Bath
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Karlsruhe Institute of Technology
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Karlsruher Institut für Technologie
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Karlsruhe Institute of Technology
Affiliation as printed
Karlsruher Institut für Technologie
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Karlsruhe Institute of Technology
Affiliation as printed
Karlsruher Institut für Technologie
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Karlsruhe Institute of Technology
Affiliation as printed
Karlsruher Institut für Technologie
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Affiliation as printed
Univ. Paris-Saclay
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Univ. Paris-Saclay
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Affiliation as printed
Durham Univ
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Université Paris Sciences et Lettres
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Univ. PSL
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Affiliation as printed
Durham Univ
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Affiliation as printed
Durham Univ
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Max Planck Institute for Astronomy
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Max-Planck-Institut für Astronomie
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Max Planck Institute for Astronomy
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Max-Planck-Institut für Astronomie
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Durham Univ
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Affiliation as printed
Univ. Paris-Saclay
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Affiliation as printed
Univ. Paris-Saclay
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Affiliation as printed
Zentrum für Astronomie der Univ. Heidelberg
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Affiliation as printed
Zentrum für Astronomie der Univ. Heidelberg
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Affiliation as printed
Durham Univ
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Karlsruhe Institute of Technology
Affiliation as printed
Karlsruher Institut für Technologie
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Affiliation as printed
Heriot-Watt Univ
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Affiliation as printed
Univ. of Bath
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden Univ
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden Univ
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