Low-loss photonic nulling interferometer in the mid-infrared for astronomical applications

Thomas Gretzinger*, Simon Gross, Alexander Arriola, Peter Tuthill, Michael J. Withford

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


We report the fabrication of a photonic Nulling Interferometer in Gallium Lanthanum Sulphide operating at 4 μm. The device has low propagion loss waveguides of 0.22 ± 0.02 dB/cm, which is sufficient enough to perform on-sky experiments.

Original languageEnglish
Title of host publicationFrontiers in Optics (FiO 2017)
Subtitle of host publicationproceedings
Place of PublicationWashington, D.C., USA
PublisherOSA - The Optical Society
Number of pages2
ISBN (Electronic)9781557528209
ISBN (Print)9781943580330
Publication statusPublished - 2017
EventFrontiers in Optics, FiO 2017 - Washington, United States
Duration: 18 Sep 201721 Sep 2017


ConferenceFrontiers in Optics, FiO 2017
CountryUnited States


  • Glass waveguides
  • Integrated optics devices

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