Integrated Optics components for astronomical interferometry in the K band

Details Integrated Optics components for astronomical interferometry in the K band Integrated Optics components for astronomical interferometry in the K band

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sf2a.conf..613l&link_type=abstract

Abstracts from SF2A-2001: Semaine de l'Astrophysique Francaise, meeting held in Lyon, France, May 28-June 1st, 2001, Eds.: F. Co

Physics

Optics

Scientific paper

We report complete lab characterizations of integrated optics beam combiners in the K band. For ion exchange beam combiners, we obtain stable contrasts higher than 95% with a lab white-light source in the astronomical K band and global throughputs larger than 35%. Silica-on-silicon beam combiners designed for the H band were also characterize in the K band. First interferograms obtained on the IOTA Interferometer with integrated planar optics beam combiners in the atmospheric K band are also reported. The encouraging results confirm that combining several stellar beams of a long baseline interferometer with a single integrated components is possible in H and K atmospheric bands. We discuss this possibility, including the concept of a single chip for the metrology and the beam combiner. The developments of beam combiners for higher wavelengths than 2.4 microns are also under the way.

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