Fiber Fabry-Perot interferometer as calibration source for medium resolution spectrographs in the visible range

Felicitas E. Niebler; Ralf Bender; Daniele Costantini; Maximilian H. Fabricius; Nicolai Granzow; Hanshin Lee; Fu Her; Gary J. Hill; Ulrich Hopp; Benjamin Staiger; Justin L. Stay

doi:10.1117/12.2560916

13 December 2020 Fiber Fabry-Perot interferometer as calibration source for medium resolution spectrographs in the visible range

Felicitas E. Niebler, Ralf Bender, Daniele Costantini, Maximilian H. Fabricius, Nicolai Granzow, Hanshin Lee, Fu Her, Gary J. Hill, Ulrich Hopp, Benjamin Staiger, Justin L. Stay

Author Affiliations +

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114515M (2020) https://doi.org/10.1117/12.2560916
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Frequency combs are an ideal light source to calibrate high resolution spectrographs. For lower resolution spectrographs such as typically used for extragalactic science, combs are not readily available. The mode spacing of combs is too narrow to be resolved at resolutions of a few 1000s and below, and actual comb systems are complex and consequently still very costly. The uneven spacing, non-ideal distribution over the wavelength range, and large dynamic range of line intensities of classical natural emission line sources limit the precision to which low to medium resolution instruments can be calibrated. Fiber Fabry Perot etalons do due not offer the same absolute stability as an actual frequency comb. It has been shown however that, when cross calibrated against a classic source, they pose a viable alternative. We will explore the first application of such a system in the optical with the R ~ 10000 optical Integral Field Unit spectrograph VIRUS-W at the McDonald observatory.

Conference Presentation

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Felicitas E. Niebler, Ralf Bender, Daniele Costantini, Maximilian H. Fabricius, Nicolai Granzow, Hanshin Lee, Fu Her, Gary J. Hill, Ulrich Hopp, Benjamin Staiger, and Justin L. Stay "Fiber Fabry-Perot interferometer as calibration source for medium resolution spectrographs in the visible range", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114515M (13 December 2020); https://doi.org/10.1117/12.2560916

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