Photonic ring resonator notch filters for astronomical OH line suppression

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

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Photonic ring resonator arrays used as notch filters are a promising novel solution to improve the signal-to-noise ratio of ground-based astronomical observations by suppressing OH emission lines in the near-infrared (NIR) wavelength range (0.9-2.5 μm). We aim to fabricate a series of ring resonators connected by a waveguide, each with its resonance wavelength and full-width-half-maximum (FWHM) matched with one of the OH emission lines.

Original languageEnglish
Title of host publicationAdvances in Optical Astronomical Instrumentation 2019
EditorsSimon Ellis, Céline d'Orgeville
Place of PublicationBellingham, Washington
Number of pages2
ISBN (Electronic)9781510631472
ISBN (Print)9781510631465
Publication statusPublished - 3 Jan 2020
Externally publishedYes
EventAdvances in Optical Astronomical Instrumentation 2019 - Melbourne, Australia
Duration: 9 Dec 201912 Dec 2019

Publication series

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


ConferenceAdvances in Optical Astronomical Instrumentation 2019

Bibliographical note

Copyright 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


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

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