24 July 2014 3D-integrated beam combiner for optical spectro-interferometry
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We present a compact setup based on a three-dimensional integrated optical component, allowing the measurement of spectrally resolved complex-visibilities for three channels of polychromatic light. We have tested a prototype of the component in R band and showed that accurate complex visibilities could be retrieved over a bandwidth of 50 nm centered at 650 nm (resolution: R=130). Closure phase stability in the order of λ/60 was achieved implying that the device could be used for spectro-interferometry imaging.
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Stefano Minardi, Stefano Minardi, Allar Saviauk, Allar Saviauk, Felix Dreisow, Felix Dreisow, Stefan Nolte, Stefan Nolte, Thomas Pertsch, Thomas Pertsch, "3D-integrated beam combiner for optical spectro-interferometry", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 91461D (24 July 2014); doi: 10.1117/12.2054880; https://doi.org/10.1117/12.2054880

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