Six-telescope integrated optics beam combiner fabricated using ultrafast laser inscription for J- and H-band astronomy

We have built and characterized, to our knowledge, the first six-telescope discrete beam combiner (DBC) for stellar interferometry in the astronomical J-band. It is the DBC with the largest number of beam combinations and was manufactured using ultrafast laser inscription in borosilicate glass, with...

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Veröffentlicht in:Applied optics (2004) 2023-10, Vol.62 (29), p.7596-7610
Hauptverfasser: Dinkelaker, Aline N., Smarzyk, Sebastian, Nayak, Abani S., Piacentini, Simone, Corrielli, Giacomo, Osellame, Roberto, Pedretti, Ettore, Roth, Martin M., Madhav, Kalaga
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Sprache:eng
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Zusammenfassung:We have built and characterized, to our knowledge, the first six-telescope discrete beam combiner (DBC) for stellar interferometry in the astronomical J-band. It is the DBC with the largest number of beam combinations and was manufactured using ultrafast laser inscription in borosilicate glass, with a throughput of ≈56%. For calibration of the visibility-to-pixel matrix, we use a two-input Michelson interferometer and extract the complex visibility. A visibility amplitude of 1.05 and relative precision of 2.9% and 3.8% are extracted for 1328 nm and 1380 nm, respectively. Broadband (≤40nm) characterization is affected by dispersion but shows similar performance.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.499135