Interferometers and spectrographs on silicon-platform for astrophysics: trends of astrophotonics

  • Harendra, N.
  • Fernando, J.
  • Stoll, A.
  • Cvetojevic, N.
  • Eisemann, R.
  • Tharanga, N.
  • Holmes, C.
  • Bohm, M.
  • Roth, M.M.
  • Haynes, R.
  • Zimmermann, L.
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Abstract

We present results of comprehensive re-design of an arrayed waveguide grating (AWG)-based integrated photonic spectrograph (IPS), using Silica-on-Silicon (SOS) technology, to tailor specific performance parameters of interest to high-resolution (resolving power, R = λ/Δλ = 60,000) exoplanet astronomy and stellar seismology. The compactness, modularity, stability, replicability and small-lightweight-payload of the IPS are a few promising and innovative features in the design of high-resolution spectrographs for astronomy or other areas of sciences. The IPS is designed to resolve up to 646 spectral lines per spectral order, with a wavelength spacing of 25 pm, at a central wavelength of 1630 nm (Hband). The fabricated test waveguides have been...

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