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Proceedings Paper

Characterization of common path phase sensing for nulling interferometry
Author(s): Peter Hill; Philip Hinz; Tom McMahon; Tom Connors; Joe Kraus
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Paper Abstract

Presented is the design of a nulling interferometer testbed which is capable of maintaining the suppression of a broadband, infrared source in the presence of external perturbations. Pathlength stability is accomplished by introducing a dispersive phase shift which allows light at a SWIR band to be used as a wavefront sensor to stabilize the nulled output of a broadband MWIR channel. Since both channels are common path, fluctuations in OPD observed with the wavefront sensor directly correlate to fluctuations of the nulling passband. Results obtained from the testbed will be useful to future nulling interferometers such as the Large Binocular Telescope Interferometer and the Terrestrial Planet Finder Interferometer which are currently being designed to aid in the search for earth-like planets outside our solar system.

Paper Details

Date Published: 28 June 2006
PDF: 7 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 626831 (28 June 2006); doi: 10.1117/12.672813
Show Author Affiliations
Peter Hill, College of Optical Sciences, Univ. of Arizona (United States)
Philip Hinz, Steward Observatory, Univ. of Arizona (United States)
Tom McMahon, Steward Observatory, Univ. of Arizona (United States)
Tom Connors, Steward Observatory, Univ. of Arizona (United States)
Joe Kraus, Steward Observatory, Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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