title: Infrared single mode chalcogenide glass fiber for space.
abstract: An important measuring technique under study for the DARWIN planet finding mission, is nulling interferometry, enabling the detection of the weak infrared emission lines of an orbiting planet. This technique requires a perfect wavefront of the light beams to be combined in the interferometer. By using a single mode waveguide before detection, wavefront errors are filtered and a virtually perfect plane wavefront is obtained. In this paper the results on the development and the optical characterisation of suitable infrared transmitting chalcogenide glasses and mid-IR guiding optical fibers are reported. Two different perform techniques for manufacturing core-cladding chalcogenide fibers are described. Two types of step index fibers, prepared with Te(2)As(3)Se(5) chalcogenide glasses, offer single mode guidance at 10.6 mum.
authors: P
authors: P
authors: Houizot
authors: C
authors: C
authors: Boussard-Plédel
authors: A J
authors: AJ
authors: Faber
authors: L K
authors: LK
authors: Cheng
authors: B
authors: B
authors: Bureau
authors: P A
authors: PA
authors: Van Nijnatten
authors: W L M
authors: WL
authors: Gielesen
authors: J
authors: J
authors: Pereira do Carmo
authors: J
authors: J
authors: Lucas