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Proceedings Paper

Nonlinear sensitivity analysis for free-flying nulling interferometers
Author(s): Klaus Ergenzinger; Oswald Wallner; Anthony Villien; Ulrich Johann
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Paper 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.

Paper Details

Date Published: 28 July 2008
PDF: 9 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 701356 (28 July 2008); doi: 10.1117/12.789187
Show Author Affiliations
Klaus Ergenzinger, Astrium GmbH (Germany)
Oswald Wallner, Astrium GmbH (Germany)
Anthony Villien, Astrium S.A.S. (France)
Ulrich Johann, Astrium GmbH (Germany)

Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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