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21 July 2010 Three-dimensional photonic combiner for optical astro interferometry
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Abstract
We put forward an innovative scheme allowing multiple beam combination and closure-phase retrieval by means of a three dimensional array of coupled optical waveguides. Light propagation in an array of evanescently coupled waveguides is similar to conventional diffraction, however it is bound to a system with finite degrees of freedom. We have demonstrated that the latter feature allows relating uniquely the intensity pattern at the end of a 3x3 waveguide array to the amplitude and relative phases of three monochromatic fields coupled to suitable input waveguides. The method is scalable to arbitrary large arrays of telescopes and baselines.
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Stefano Minardi, Thomas Pertsch, and Ralph Neuhaeuser "Three-dimensional photonic combiner for optical astro interferometry", Proc. SPIE 7734, Optical and Infrared Interferometry II, 77343P (21 July 2010); https://doi.org/10.1117/12.856446
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