Photonics-based mid-infrared interferometry: the challenges of polychromatic operation and comparative performances
J. Tepper, R. Diener, L. Labadie, S. Minardi, S. Gross, Al. Arriola, M. Withford, S. Nolte
Proceedings Volume 10701, Optical and Infrared Interferometry and Imaging VI; 107011B (2018) https://doi.org/10.1117/12.2307823
This paper is one of a three-part series of papers on photonics-based mid-IR interferometry. Here, we put the emphasis on the challenges of operating integrated optics over a broad wavelength range, a natural condition in the field of Astrophysics. We report on the recent advancements made in obtaining high interferometric contrast (> 90%) through 2-telescope combiners in the mid-IR and give an outlook on more advanced functions and 4-telescope combiners.