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Journal Articles Optic Express Year : 2011

Phase closure retrieval in an infrared-to-visible upconversion interferometer for high resolution astronomical imaging

Damien Ceus
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  • PersonId : 914219
Alessandro Tonello
Ludovic Grossard
Laurent Delage
François Reynaud

Abstract

This paper demonstrates the use of a nonlinear upconversion process to observe an infrared source through a telescope array detecting the interferometric signal in the visible domain. We experimentally demonstrate the possibility to retrieve information on the phase of the object spectrum of an infrared source by using a three-arm upconversion interferometer. We focus our study on the acquisition of phase information of the complex visibility by means of the phase closure technique. In our experimental demonstration, a laboratory binary star with an adjustable photometric ratio is used as a test source. A real time comparison between a standard three-arm interferometer and our new concept using upconversion by sum-frequency generation demonstrates the preservation of phase information which is essential for image reconstruction.

Dates and versions

hal-00687599 , version 1 (13-04-2012)

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Damien Ceus, Alessandro Tonello, Ludovic Grossard, Laurent Delage, François Reynaud, et al.. Phase closure retrieval in an infrared-to-visible upconversion interferometer for high resolution astronomical imaging. Optic Express, 2011, 19 (9), pp.8616.8624. ⟨10.1364/OE.19.008616⟩. ⟨hal-00687599⟩

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