Nonlinear sensitivity analysis for free-flying nulling interferometers

Details Nonlinear sensitivity analysis for free-flying nulling interferometers Nonlinear sensitivity analysis for free-flying nulling interferometers

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7013e.164e&link_type=abstract

Optical and Infrared Interferometry. Edited by Schöller, Markus; Danchi, William C.; Delplancke, Françoise. Proceedings of the

Computer Science

Performance

Scientific paper

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.

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