4 August 2016 Increasing the spectral coverage of interferometric integrated optics: K/L and N-laser-written beam combiners
Author Affiliations +
Abstract
Integrated optics (IO) has proven to be a competitive solution for beam combination in the context of astronomical interferometry (e.g. GRAVITY at the VLTI). However, conventional silica-based lithographic IO is limited to wavelengths shorter than 2.2μm. We report in this paper the progress on our attempt to extend the operation of IO to longer wavelengths. Previous work has demonstrated the suitability of chalcogenide devices in the MID-IR in the N band and monochromatically at 3.39 μm. Here, we continue this effort with the manufacturing of new laser written GLS IO as beam combiners designed for the astronomical L band and characterized interferometrically at 3.39 μm. In the era of multi-telescope interferometers, we present a promising solution to strengthen the potential of IO for new wavelength ranges.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jan Tepper, Jan Tepper, Romina Diener, Romina Diener, Lucas Labadie, Lucas Labadie, Stefano Minardi, Stefano Minardi, Balaji Muthusubramanian, Balaji Muthusubramanian, Jörg-Uwe Pott, Jörg-Uwe Pott, Stefan Nolte, Stefan Nolte, Alexander Arriola, Alexander Arriola, Gillian Madden, Gillian Madden, Debaditya Choudhury, Debaditya Choudhury, William N. MacPherson, William N. MacPherson, Robert R. Thomson, Robert R. Thomson, } "Increasing the spectral coverage of interferometric integrated optics: K/L and N-laser-written beam combiners", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 990719 (4 August 2016); doi: 10.1117/12.2231394; https://doi.org/10.1117/12.2231394
PROCEEDINGS
7 PAGES


SHARE
Back to Top