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28 July 2008 Nonlinear sensitivity analysis for free-flying nulling interferometers
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Abstract
Spectroscopy of exoplanets around near-by stars is one of the most fascinating but also most challenging science goals of our days. The ESA DARWIN mission as well as NASA TPF-I rely on nulling interferometry. The measurement principle underlying their nulling science mode is essentially nonlinear. On the one hand in terms of null depth as a function of amplitude and phase noise, and on the other hand in terms of fiber coupling as function of science beam pointing and lateral offset. We present a performance breakdown and an end-to-end performance simulation for DARWIN with focus on principal limitations, and with a clear distinction between static null depth contributors, dynamic error contributors, and so-called instability noise within the overall system. We additionally discuss the derived next-step development efforts for critical subsystems.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Klaus Ergenzinger, Oswald Wallner, Anthony Villien, and Ulrich Johann "Nonlinear sensitivity analysis for free-flying nulling interferometers", Proc. SPIE 7013, Optical and Infrared Interferometry, 701356 (28 July 2008); https://doi.org/10.1117/12.789187
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