Abstract
Determining the radial velocity and atmospheric composition of exoplanets is typically performed using dispersive spectroscopy. However, while this approach is versatile, spectrometers for such applications are complex, expensive and are bulky instruments. In contrast, tunable fiber-based filters are commercially available and can be used for low cost, passive remote gas sensing. In this work, we experimentally demonstrate Fabry-Pérot based correlation spectroscopy in a simple, low-cost, compact, and stable instrument package for astrophotonic gas sensing. We also show via simulation that exoplanet radial velocities can be determined simultaneously.
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