Optimizing photonic ring-resonator filters for OH-suppressed near-infrared astronomy

Pufan Liu*, David A. Czaplewski, Simon Ellis, Robert Kehoe, Kyler Kuehn, Harold M. Spinka, Nathaniel P. Stern, David G. Underwood, Steve Kuhlmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Near-infrared wavelength observations are crucial for understanding numerous fields of astrophysics, such as supernova cosmology and positronium annihilation detection.However, current ground-based observations suffer from an enormous background due to OH emission in the upper atmosphere. One promising way to solve this problem is to use ring-resonator filters to suppress OH emission lines. In this work, we discuss our optimization of ring-resonator filter performance from five perspectives: Resonance wavelength matching, polarizationindependent operation, low insertion loss, low-loss coupling to astronomical instruments, and broadband operation. In the end, we discuss next steps needed for reliable supernova and positronium observations, thus providing a roadmap for future advances in near-infrared astronomy.

Original languageEnglish
Pages (from-to)3865-3873
Number of pages9
JournalApplied Optics
Issue number13
Publication statusPublished - 1 May 2021


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