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Proceedings Paper

Test results of the infrared single-mode fiber for the DARWIN mission
Author(s): Lun K. Cheng; Anne-Jans Faber; Wim Gielesen; Catherine Boussard-Pledel; Patrick Houizot; Jacques Lucas; Joao Pereira Do Carmo
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Paper Abstract

Nulling interferometry is the baseline technique for the DARWIN planet finding mission of the European Space Agency. Using this technique it will be possible to cancel, by destructive interference, the light from the bright star and look directly at its surrounding planets and eventually discover life on them. To achieve this goal wavefront errors need to be reduced to a very high degree in order to achieve the required nulling quality. Such a high wavefront quality can only be achieved with adequate wavefront filtering measures. Single mode fibers in general have excellent mode filtering capabilities, but they were not recently available for the broad infrared wavelength region of Darwin (4-20 um). Within an ESA technology development project, TNO has designed and tested an infrared single mode fiber based on chalcogenide glasses that has been manufactured by the University of Rennes. Several tests are carried out to characterize the materials used and the IR single mode fiber. Far field intensity distribution measurement at 10.6 um reveals the single mode operation of the manufactured fiber. Influence of coating, length, light coupling and bending of the fiber are also investigated.

Paper Details

Date Published: 5 October 2005
PDF: 8 pages
Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 59051F (5 October 2005); doi: 10.1117/12.616797
Show Author Affiliations
Lun K. Cheng, TNO Science and Industry (Netherlands)
Anne-Jans Faber, TNO Science and Industry (Netherlands)
Wim Gielesen, TNO Science and Industry (Netherlands)
Catherine Boussard-Pledel, Univ. of Rennes, Beaulieu (France)
Patrick Houizot, Univ. of Rennes, Beaulieu (France)
Jacques Lucas, Univ. of Rennes, Beaulieu (France)
Joao Pereira Do Carmo, European Space Agency (Netherlands)

Published in SPIE Proceedings Vol. 5905:
Techniques and Instrumentation for Detection of Exoplanets II
Daniel R. Coulter, Editor(s)

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