Development status of the L’-band 4-telescope integrated optics nulling beam combiner for NOTT

Ahmed Sanny; Lucas Labadie; Simon Gross; Michael Withford; Romain Laugier; Marc-Antoine Martinod; Germain Garreau; Denis Defrère

doi:10.1117/12.3018873

28 August 2024 Development status of the L’-band 4-telescope integrated optics nulling beam combiner for NOTT

Ahmed Sanny, Lucas Labadie, Simon Gross, Michael Withford, Romain Laugier, Marc-Antoine Martinod, Germain Garreau, Denis Defrère

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 130950Q (2024) https://doi.org/10.1117/12.3018873
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

As the high-contrast visitor instrument for VLTI, the NOTT aims to detect and characterize young exoplanets in the mid-infrared L’ band through nulling interferometry. This report outlines recent advancements in component fabrication via ultrafast laser inscription on GLS samples. Laboratory characterization, conducted on a 4-spectral interferometric testbench, is the first detailed mid-infrared characterization of such a photonic chip in its complete four-telescope nulling configuration, demonstrates favorable throughput, achromatic splitting ratios, and self-calibrated nulling performance within the 3.65-3.85 µm range. These achievements align with the specific requirements of NOTT, marking significant progress in meeting its specifications for high-precision observations.

Conference Presentation

Citation Download Citation

Ahmed Sanny, Lucas Labadie, Simon Gross, Michael Withford, Romain Laugier, Marc-Antoine Martinod, Germain Garreau, and Denis Defrère "Development status of the L’-band 4-telescope integrated optics nulling beam combiner for NOTT", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 130950Q (28 August 2024); https://doi.org/10.1117/12.3018873

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