Updated results on prototype chalcogenide fibers for 10-um wavefront spatial filtering

Details Updated results on prototype chalcogenide fibers for 10-um wavefront spatial filtering Updated results on prototype chalcogenide fibers for 10-um wavefront spatial filtering

2003-05-15

arxiv.org/abs/astro-ph/0305271v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, to appear in the proceedings of the conference "Toward Other Earths, Darwin/TPF and the search for extraso

Scientific paper

The detection of terrestrial planets by Darwin/TPF missions will require extremely high quality wavefronts. Single-mode fibers have proven to be powerful beam cleaning components in the near-infrared, but are currently not available in the mid-infrared where they would be critically needed for Darwin/TPF. In this paper, we present updated measurements on the prototype chalcogenide fibers we are developing for the purpose of mid-infrared spatial filtering. We demonstrate the guiding property of our 3rd generation component and we characterize its filtering performances on a 4 mm length: the far-field radiation pattern matches a Gaussian profile at the level of 3% rms and 13% pk-pk.

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