Photonics-based mid-infrared interferometry: 4-year results of the ALSI project and future prospects

Lucas Labadie; Stefano Minardi; Jan Tepper; Romina Diener; Balaji Muthusubramanian; Jörg-Uwe Pott; Stefan Nolte; Simon Gross; Alexander Arriola; Michael J. Withford

doi:10.1117/12.2312930

9 July 2018 Photonics-based mid-infrared interferometry: 4-year results of the ALSI project and future prospects

Lucas Labadie, Stefano Minardi, Jan Tepper, Romina Diener, Balaji Muthusubramanian, Jörg-Uwe Pott, Stefan Nolte, Simon Gross, Alexander Arriola, Michael J. Withford

Author Affiliations +

Proceedings Volume 10701, Optical and Infrared Interferometry and Imaging VI; 107011R (2018) https://doi.org/10.1117/12.2312930
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

In this contribution, we review the results of the ALSI project (Advanced Laser-writing for Stellar Interferometry), aimed at assessing the potential of ultrafast laser writing to fabricate mid-infared integrated optics (IO) devices with performance compatible with an implementation in real interferometric instruments like Hi5 or PFI. Waveguides for the L, L' and M bands with moderate propagation losses were manufactured in Gallium Lanthanum Sulfide and ZBLAN glasses and used to develop photonic building blocks as well as a full mid-IR 4-telescope beam combiner. We discuss the advantages and disadvantages of the tested combiners and discuss a possible roadmap for the continuation of this work.

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Lucas Labadie, Stefano Minardi, Jan Tepper, Romina Diener, Balaji Muthusubramanian, Jörg-Uwe Pott, Stefan Nolte, Simon Gross, Alexander Arriola, and Michael J. Withford "Photonics-based mid-infrared interferometry: 4-year results of the ALSI project and future prospects", Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107011R (9 July 2018); https://doi.org/10.1117/12.2312930

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