Single mode chalcogenide glass fiber as wavefront filter for the DARWIN planet finding misson

Faber, A.J.; Cheng, L.K.; Gielesen, W.L.M.; Boussard-Plédel, C.; Houizot, P.; Danto, S.; Lucas, J.; Pereira Do Carmo, J.

doi:10.1117/12.2308144

Single mode chalcogenide glass fiber as wavefront filter for the DARWIN planet finding misson

Title

Single mode chalcogenide glass fiber as wavefront filter for the DARWIN planet finding misson

Author

Faber, A.J.
Cheng, L.K.
Gielesen, W.L.M.
Boussard-Plédel, C.
Houizot, P.
Danto, S.
Lucas, J.
Pereira Do Carmo, J.

Contributor

Costeraste J., (editor)
Armandillo, E. (editor)
Karafolas, N. (editor)

Publication year

2017

Abstract

The development of single mode chalcogenide glass fibers as wavefront filter for the DARWIN mission is reported. Melting procedures and different preform techniques for manufacturing core-cladding chalcogenide fibers are described. Bulk glass samples on the basis of Te-As-Se- and high Te-compositions have been characterized optically, by measurement of the absorption spectrum and the refractive index in the region 4 – 20 μm. Several chalcogenide core-cladding glass fiber configurations have been drawn and examined by microscopy. The mode propagation behaviour and numerical aperture of fiber samples have been determined by far field intensity distribution measurements, using a CO2 laser at 10.6 μm. Single mode waveguide performance has been demonstrated for several fiber samples, coated with an absorbing Gallium layer for stripping of cladding modes.

Subject

Absorption spectroscopy
Bandpass filters
Carbon dioxide lasers
Chalcogenides
Glass fibers
Optical fibers
Optical waveguides
Refractive index
Wavefronts
Chalcogenide glass fibers
Far-field intensity distribution
Fiber configuration
Mode propagation
Numerical aperture
Planet finding
Single mode waveguides
Fibers
Industrial Innovation
Fluid Mechanics Chemistry & Energetics
PMC - Process Modelling & Control
TS - Technical Sciences