Visible and near-infrared multilayer arrayed waveguide gratings

a novel approach for spectro-interferometry

G. Douglass, A. Arriola, S. Gross, M. J. Withford, E. Le Coarer, G. Martin*

*Corresponding author for this work

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

Abstract

In this paper, we propose a multilayer arrayed waveguide gratings (AWG) for spectro-interferometry applications which were fabricated using the femtosecond laser direct writing technique. Individually these devices consisted on an array of 19 single mode waveguides, were designed for operation at 633nm, and have a measured free spectral range of 28nm and a resolution of 4 nm. The aim of this work is to show the potential of arrayed waveguides gratings (AWG) stacked in a vertical layered structure, in order to simultaneously achieve spectral dispersion and multi-telescope interferometry for astrophotonic applications (visibility vs baseline as a function of wavelength). In particular, with the fabrication of three independent AWG, we can address closure phase studies, an important tool for exoplanet detection in astronomy.

Original languageEnglish
Title of host publicationOptical and Infrared Interferometry and Imaging VI
EditorsMichelle J. Creech-Eakman, Peter G. Tuthill, Antoine Mérand
Place of PublicationBellingham, Washington
PublisherSPIE
Number of pages7
ISBN (Electronic)9781510619562
ISBN (Print)9781510619555
DOIs
Publication statusPublished - 9 Jul 2018
Event2018 Optical and Infrared Interferometry and Imaging VI - Austin, United States
Duration: 11 Jun 201815 Jun 2018

Publication series

NameProceedings of SPIE
Volume10701
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2018 Optical and Infrared Interferometry and Imaging VI
CountryUnited States
CityAustin
Period11/06/1815/06/18

Keywords

  • Electro-optic modulation
  • Integrated Optics Beam Combiners
  • mid-infrared waveguides
  • Nulling Interferometry
  • Photonic Crystals
  • Spectro-Interferometry

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