2 January 2018 Photonic ring resonator notch filters for astronomical OH suppression
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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.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Kuhlmann, S. Kuhlmann, P. Liu, P. Liu, S. C. Ellis, S. C. Ellis, K. Kuehn, K. Kuehn, H. Spinka, H. Spinka, D. Underwood, D. Underwood, L. Ocola, L. Ocola, R. R. Gupta, R. R. Gupta, N. P. Stern, N. P. Stern, } "Photonic ring resonator notch filters for astronomical OH suppression", Proc. SPIE 10456, Nanophotonics Australasia 2017, 104564B (2 January 2018); doi: 10.1117/12.2283353; https://doi.org/10.1117/12.2283353

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