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Proceedings Paper • Open Access

Radiation hardening of optical fibers and fiber sensors for space applications: recent advances
Author(s): S. Girard; Y. Ouerdane; E. Pinsard; A. Laurent; A. Ladaci; T. Robin; B. Cadier; L. Mescia; A. Boukenter

Paper Abstract

In these ICSO proceedings, we review recent advances from our group concerning the radiation hardening of optical fiber and fiber-based sensors for space applications and compare their benefits to state-of-the-art results. We focus on the various approaches we developed to enhance the radiation tolerance of two classes of optical fibers doped with rare-earths: the erbium (Er)-doped ones and the ytterbium/erbium (Er/Yb)-doped ones. As a first approach, we work at the component level, optimizing the fiber structure and composition to reduce their intrinsically high radiation sensitivities. For the Erbium-doped fibers, this has been achieved using a new structure for the fiber that is called Hole-Assisted Carbon Coated (HACC) optical fibers whereas for the Er/Ybdoped optical fibers, their hardening was successfully achieved adding to the fiber, the Cerium element, that prevents the formation of the radiation-induced point defects responsible for the radiation induced attenuation in the infrared part of the spectrum. These fibers are used as part of more complex systems like amplifiers (Erbium-doped Fiber Amplifier, EDFA or Yb-EDFA) or source (Erbium-doped Fiber Source, EDFS or Yb- EDFS), we discuss the impact of using radiation-hardened fibers on the system radiation vulnerability and demonstrate the resistance of these systems to radiation constraints associated with today and future space missions. Finally, we will discuss another radiation hardening approach build in our group and based on a hardening-by-system strategy in which the amplifier is optimized during its elaboration for its future mission considering the radiation effects and not in-lab.

Paper Details

Date Published: 17 November 2017
PDF: 9 pages
Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 105632B (17 November 2017); doi: 10.1117/12.2304258
Show Author Affiliations
S. Girard, Univ. de Saint-Etienne, Lab. Hubert Curien (France)
Y. Ouerdane, Univ. de Saint-Etienne, Lab. Hubert Curien (France)
E. Pinsard, iXFiber SAS (France)
A. Laurent, iXFiber SAS (France)
A. Ladaci, Univ. de Saint-Etienne, Lab. Hubert Curien (France)
iXFiber SAS (France)
Politecnico di Bari (Italy)
T. Robin, iXFiber SAS (France)
B. Cadier, iXFiber SAS (France)
L. Mescia, Politecnico di Bari (Italy)
A. Boukenter, Univ. de Saint-Etienne, Lab. Hubert Curien (France)

Published in SPIE Proceedings Vol. 10563:
International Conference on Space Optics — ICSO 2014
Zoran Sodnik; Bruno Cugny; Nikos Karafolas, Editor(s)

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