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20 October 2004 Nulling interferometer based on an integrated optics combiner
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The Multi-Aperture Imaging Interferometer (MAI2), which Alcatel Space has been developing for ESA for deep nulling demonstration in preparation of the Darwin project, is based on an innovative layout, where both beam combination and modal wave-front filtering functions are achieved by means of an Integrated Optics (IO) component. Two different components, based on different designs and technologies, have been developed and characterised by LAOG with detailed design and manufacturing performed by IMEP/GeeO/LETI. SAGEIS-CSO (optical path control) and Alcatel Space have developed the other breadboard functions. The MAI² interferometer achieved stable Darwin-class nulling (10-5) of a simulated star in monochromatic light, and with a relative bandwidth of several percent (10-4). Operation in non-polarised light, with unchanged nulling performances, was also demonstrated. Preliminary characterisation of the relationship between nulling and bandwidth is also provided.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Valerie Weber, Marc Barillot, Pierre Haguenauer, Pierre Y. Kern, Isabelle Schanen-Duport, Pierre R. Labeye, Laurence Pujol, and Zoran Sodnik "Nulling interferometer based on an integrated optics combiner", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004);

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