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On-sky results for the integrated microlens ring tip-tilt sensor

We present the first on-sky results of the microlens ring tip-tilt sensor. This sensor uses a 3D printed microlens ring feeding six multimode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows the beam to be corrected, increasing the amount of light coupled...

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Main Authors: Hottinger, Philipp (Author) , Harris, Robert J. (Author) , Crass, Jonathan (Author) , Dietrich, Philipp-Immanuel (Author) , Blaicher, Matthias (Author) , Bechter, Andrew (Author) , Sands, Brian (Author) , Morris, Timothy (Author) , Basden, Alastair G. (Author) , Bharmal, Nazim Ali (Author) , Heidt, Jochen (Author) , Anagnos, Theodoros (Author) , Neureuther, Philip L. (Author) , Glück, Martin (Author) , Power, Jennifer (Author) , Pott, Jörg-Uwe (Author) , Koos, Christian (Author) , Sawodny, Oliver (Author) , Quirrenbach, Andreas (Author)
Format: Article (Journal)
Language:English
Published: 9 August 2021
In: Journal of the Optical Society of America. B, Optical physics
Year: 2021, Volume: 38, Issue: 9, Pages: 2517-2527
ISSN:1520-8540
DOI:10.1364/JOSAB.421459
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1364/JOSAB.421459
Verlag, lizenzpflichtig, Volltext: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-38-9-2517
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Author Notes:Philipp Hottinger, Robert J. Harris, Jonathan Crass, Philipp-Immanuel Dietrich, Matthias Blaicher, Andrew Bechter, Brian Sands, Timothy Morris, Alastair G. Basden, Nazim Ali Bharmal, Jochen Heidt, Theodoros Anagnos, Philip L. Neureuther, Martin Glück, Jennifer Power, Jörg-Uwe Pott, Christian Koos, Oliver Sawodny, and Andreas Quirrenbach
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Summary:We present the first on-sky results of the microlens ring tip-tilt sensor. This sensor uses a 3D printed microlens ring feeding six multimode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows the beam to be corrected, increasing the amount of light coupled into a centrally positioned single-mode (science) fiber. The sensor was tested with the iLocater acquisition camera at the Large Binocular Telescope in Tucson, Arizona, in November 2019. The limit on the maximum achieved rms reconstruction accuracy was found to be 0.19λ/D in both tip and tilt, of which approximately 50% of the power originates at frequencies below 10 Hz. We show the reconstruction accuracy is highly dependent on the estimated Strehl ratio and simulations support the assumption that residual adaptive optics aberrations are the main limit to the reconstruction accuracy. We conclude that this sensor is ideally suited to remove post-adaptive optics noncommon path tip-tilt residuals. We discuss the next steps for concept development, including optimization of the lens and the fiber, tuning of the correction algorithm, and selection of optimal science cases.
Item Description:Gesehen am 08.11.2021
Physical Description:Online Resource
ISSN:1520-8540
DOI:10.1364/JOSAB.421459

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