TY - JOUR
T1 - Diffraction-limited integral-field spectroscopy for extreme adaptive optics systems with the multicore fiber-fed integral-field unit
AU - Haffert, Sebastiaan Y.
AU - Harris, Robert J.
AU - Zanutta, Alessio
AU - Pike, Fraser A.
AU - Bianco, Andrea
AU - Redaelli, Eduardo
AU - Benoît, Aurélien
AU - Maclachlan, David G.
AU - Ross, Calum A.
AU - Gris-Sánchez, Itandehui
AU - Trappen, Mareike D.
AU - Xu, Yilin
AU - Blaicher, Matthias
AU - Maier, Pascal
AU - Riva, Giulio
AU - Sinquin, Baptiste
AU - Kulcsár, Caroline
AU - Bharmal, Nazim Ali
AU - Gendron, Eric
AU - Staykov, Lazar
AU - Morris, Tim J.
AU - Barboza, Santiago
AU - Muench, Norbert
AU - Bardou, Lisa
AU - Prengère, Léonard
AU - Raynaud, Henri François
AU - Hottinger, Phillip
AU - Anagnos, Theodoros
AU - Osborn, James
AU - Koos, Christian
AU - Thomson, Robert R.
AU - Birks, Tim A.
AU - Snellen, Ignas A. G.
AU - Keller, Christoph U.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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.
AB - 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.
KW - adaptive optics
KW - astrophotonics
KW - exoplanets
KW - integral-field spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85098681866&partnerID=8YFLogxK
U2 - 10.1117/1.JATIS.6.4.045007
DO - 10.1117/1.JATIS.6.4.045007
M3 - Article
AN - SCOPUS:85098681866
SN - 2329-4124
VL - 6
SP - 045007-1-045007-24
JO - Journal of Astronomical Telescopes, Instruments, and Systems
JF - Journal of Astronomical Telescopes, Instruments, and Systems
IS - 4
M1 - 045007
ER -