LiNbO3 Fabry-Perot etalons for solar near-infrared narrow-passband tunable filtergraph

Yoshinori Suematsu; Tomoya Iju; Kazuya Shinoda; Masaki Hagino; Satoru Ueno

doi:10.1117/12.2632133

30 September 2022 LiNbO₃ Fabry-Perot etalons for solar near-infrared narrow-passband tunable filtergraph

Yoshinori Suematsu, Tomoya Iju, Kazuya Shinoda, Masaki Hagino, Satoru Ueno

Proceedings Volume 12235, Imaging Spectrometry XXV: Applications, Sensors, and Processing; 1223507 (2022) https://doi.org/10.1117/12.2632133
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

We describe newly developed voltage-tunable lithium-niobate (LiNbO3) Fabry-Perot etalons for solar near-infrared filtergraph. Two etalons were fabricated for tandem use: One etalon is 0.9 mm thick and the other is 1.2 mm thick, optimized in ordinary ray transmission for both He I 1083.035 nm and magnetic sensitive Fe I 1564.85 nm lines. The etalons are Y-cut lithium-niobate wafers coated with highly reflective and conductive (ITO) layers. We examined optical and voltage-tunable properties of the etalons using the horizontal spectrograph of the Domeless Solar Telescope at Hida Observatory, Kyoto University. Some solar observations with tandem etalons were also ran and their good imaging quality was demonstrated. Some results from the measurements are reported.

Conference Presentation

Citation Download Citation

Yoshinori Suematsu, Tomoya Iju, Kazuya Shinoda, Masaki Hagino, and Satoru Ueno "LiNbO₃ Fabry-Perot etalons for solar near-infrared narrow-passband tunable filtergraph", Proc. SPIE 12235, Imaging Spectrometry XXV: Applications, Sensors, and Processing, 1223507 (30 September 2022); https://doi.org/10.1117/12.2632133

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