Design, simulation and characterization of integrated photonic spectrographs for astronomy II: low-aberration Generation-II AWG devices with three stigmatic points.

@article{Stoll2021DesignSA,
  title={Design, simulation and characterization of integrated photonic spectrographs for astronomy II: low-aberration Generation-II AWG devices with three stigmatic points.},
  author={Andreas Stoll and Kalaga Madhav and Martin M. Roth},
  journal={Optics express},
  year={2021},
  volume={29 22},
  pages={
          36226-36241
        }
}
In the second part of our series on integrated photonic spectrographs for astronomy, we present theoretical and experimental results on the design, simulation and characterization of custom-manufactured silica-on-silicon arrayed waveguide gratings (AWGs) constructed using the three-stigmatic-point method. We derive several mid-to-high resolution field-flattened AWG designs, targeting resolving powers of 11,000 - 35,000 in the astronomical H-band, by iterative computation of differential… 

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TLDR
An experimental study on the first generation of custom-developed arrayed waveguide gratings on a silica platform for spectroscopic applications in near-infrared astronomy and identifies phase error control, birefringence control, and aberration suppression as the three key areas of future research and development in the field of high-resolution AWG-based spectroscopy in astronomy.
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