Three-dimensional photonic combiner for optical astro interferometry

Stefano Minardi; Thomas Pertsch; Ralph Neuhaeuser

doi:10.1117/12.856446

21 July 2010 Three-dimensional photonic combiner for optical astro interferometry

Stefano Minardi, Thomas Pertsch, Ralph Neuhaeuser

Proceedings Volume 7734, Optical and Infrared Interferometry II; 77343P (2010) https://doi.org/10.1117/12.856446
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

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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