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Proceedings Paper

Results on the development of mid-infrared integrated optics for the Darwin Mission
Author(s): Lucas Labadie; Jean-Emmanuel Broquin; Pierre Kern; Pierre Labeye; Brahim Arezki; Isabelle Schanen-Duport; Annie Pradel; Caroline Vigreux-Bercovici; Bernard Andre; Pierre Saguet
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Paper Abstract

To detect earth-like planets orbiting around solar-type stars in the mid-infrared spectral range, a typical rejection ratio of 106 of the stellar flux must be achieved. Space missions like Darwin/TPF aim at achieving such contrasts using nulling interferometry between 4 μm and 20 μm. The instrumental constraints on beam combination, spatial filtering, intensity and phase mismatches must then be accurately considered. This paper presents the first characterization results of mid-infrared waveguides for integrated optics (IO) developed in the frame of an ESA contract. Taking into account the scientific achievements already obtained with IO components in the near infrared range, results demonstrate that these technologies can also be used for future nulling devices as an alternative to bulk optics instrumentation in the mid-infrared spectral range. Good waveguiding behaviour has been obtained on dielectric waveguides based on Chalcogenide or Zinc Selenide glasses and Hollow Metallic Waveguides. The single-mode behavior, spatial filtering and polarization control capabilities of the hollow metallic channel waveguides have been also demonstrated. This paper focuses on the methods used to validate the waveguide behaviour and the first laboratory results obtained with the different technologies used in the mid-infrared.

Paper Details

Date Published: 14 September 2005
PDF: 11 pages
Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 590509 (14 September 2005); doi: 10.1117/12.617417
Show Author Affiliations
Lucas Labadie, Lab. d'Astrophysique de Grenoble (France)
Jean-Emmanuel Broquin, Institut de Microelectronique, Electromagnetisme et Photonique (France)
Pierre Kern, Lab. d'Astrophysique de Grenoble (France)
Pierre Labeye, Lab. d'Electronique et des Technologies de l'Information, CEA-LETI (France)
Brahim Arezki, Lab. d'Astrophysique de Grenoble (France)
Isabelle Schanen-Duport, Institut de Microelectronique, Electromagnetisme et Photonique (France)
Annie Pradel, Lab. de Physico-Chimie de la Matiere Condensee (France)
Caroline Vigreux-Bercovici, Lab. de Physico-Chimie de la Matiere Condensee (France)
Bernard Andre, Lab. d'Electronique et des Technologies de l'Information, CEA-LETI (France)
Pierre Saguet, Institut de Microelectronique, Electromagnetisme et Photonique (France)


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

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