Integrated discrete beam combiner with a pupil remapper for stellar interferometry (Conference Presentation)

Simone Piacentini; Giacomo Corrielli; Abani Shankar Nayak; Tarun Kumar Sharma; Kalaga V. Madhav; Ettore Pedretti; Stefano Minardi; Lucas Labadie; Roberto Osellame

doi:10.1117/12.2545027

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9 March 2020 Integrated discrete beam combiner with a pupil remapper for stellar interferometry (Conference Presentation)

Simone Piacentini, Giacomo Corrielli, Abani Shankar Nayak, Tarun Kumar Sharma, Kalaga V. Madhav, Ettore Pedretti, Stefano Minardi, Lucas Labadie, Roberto Osellame

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Proceedings Volume 11287, Photonic Instrumentation Engineering VII; 112870B (2020) https://doi.org/10.1117/12.2545027
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Stellar interferometry performed in integrated photonic devices allows to increase the angular resolution of a ground-based telescope. Here we present the fabrication and characterization of a low-loss polarization insensitive photonic circuit for astrophotonics, whose geometry was engineered to combine interferometrically up to eight input beams. The employed fabrication technique consisted in the femtosecond laser micromachining followed by a thermal annealing to reduce the birefringence of the waveguides. The fabricated device was characterized to validate its functioning in terms of polarization insensitivity, good transmission and proper beam combination, thus benchmarking its suitability with real on-sky observations.

Conference Presentation

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Simone Piacentini, Giacomo Corrielli, Abani Shankar Nayak, Tarun Kumar Sharma, Kalaga V. Madhav, Ettore Pedretti, Stefano Minardi, Lucas Labadie, and Roberto Osellame "Integrated discrete beam combiner with a pupil remapper for stellar interferometry (Conference Presentation)", Proc. SPIE 11287, Photonic Instrumentation Engineering VII, 112870B (9 March 2020); https://doi.org/10.1117/12.2545027

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