Photonic ring resonator notch filters for astronomical OH suppression

S. Kuhlmann*, P. Liu, S. C. Ellis, K. Kuehn, H. Spinka, D. Underwood, L. Ocola, R. R. Gupta, N. P. Stern

*Corresponding author for this work

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

2 Scopus citations


Photonic ring resonators used as wavelength notch filters are a promising novel solution to enable astronomical instruments to remove the signal from atmospheric OH emission in the near-infrared wavelength range. We derive design requirements from theory and finite difference time domain simulations. We find rings with radii less than 10 microns provide an adequate free spectral range for silicon nitride abd less than 3 microns for silicon. One challenge for this application is the requirement for many rings in series to suppress particular wavelengths within 0.2nm. We report progress in fabricating both silicon and silicon nitride rings for OH suppression.

Original languageEnglish (US)
Title of host publicationNanophotonics Australasia 2017
EditorsBaohua Jia, James W. M. Chon
ISBN (Electronic)9781510613935
StatePublished - 2017
EventNanophotonics Australasia 2017 - Melbourne, Australia
Duration: Dec 10 2017Dec 13 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherNanophotonics Australasia 2017


  • Astronomical optics
  • Filters
  • Micro-optical devices
  • Ring Resonators
  • Waveguides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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