First on-sky results with an interferometric discrete beam combiner (DBC) at the William Herschel Telescope

Abani Shankar Nayak; Tarun Kumar Sharma; Lucas Labadie; Simone Piacentini; Giacomo Corrielli; Roberto Osellame; Éric Gendron; Jean-Tristan M. Buey; Fanny Chemla; Mathieu Cohen; Nazim A. Bharmal; Lisa F. Bardou; Lazar Staykov; James Osborn; Timothy J. Morris; Ettore Pedretti; Aline N. Dinkelaker; Kalaga V. Madhav; Martin M. Roth

doi:10.1117/12.2562563

13 December 2020 First on-sky results with an interferometric discrete beam combiner (DBC) at the William Herschel Telescope

Abani Shankar Nayak, Tarun Kumar Sharma, Lucas Labadie, Simone Piacentini, Giacomo Corrielli, Roberto Osellame, Éric Gendron, Jean-Tristan M. Buey, Fanny Chemla, Mathieu Cohen, Nazim A. Bharmal, Lisa F. Bardou, Lazar Staykov, James Osborn, Timothy J. Morris, Ettore Pedretti, Aline N. Dinkelaker, Kalaga V. Madhav, Martin M. Roth

Author Affiliations +

Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114461D (2020) https://doi.org/10.1117/12.2562563
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

In long-baseline interferometry, over the last few decades integrated optics beam combiners have become at- tractive technological solutions for new-generation instruments operating at infrared wavelengths. We have investigated different architectures of discrete beam combiners (DBC), which are 2D lattice arrangement of channel waveguides that can be fabricated by exploiting the 3D capability of the ultrafast laser inscription (ULI) fabrication techniques. Here, we present the first interferometric on-sky results of an integrated optics beam combiner based on a coherent pupil remapper and 4 input/23 output zig-zag based DBC, both written monolith- ically in a single borosilicate glass. We show the preliminary results of visibility amplitudes and closure phases obtained from the Vega star by using the previously calibrated transfer matrix of the device.

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Abani Shankar Nayak, Tarun Kumar Sharma, Lucas Labadie, Simone Piacentini, Giacomo Corrielli, Roberto Osellame, Éric Gendron, Jean-Tristan M. Buey, Fanny Chemla, Mathieu Cohen, Nazim A. Bharmal, Lisa F. Bardou, Lazar Staykov, James Osborn, Timothy J. Morris, Ettore Pedretti, Aline N. Dinkelaker, Kalaga V. Madhav, and Martin M. Roth "First on-sky results with an interferometric discrete beam combiner (DBC) at the William Herschel Telescope", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114461D (13 December 2020); https://doi.org/10.1117/12.2562563

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