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Proceedings Paper

Radiation hardening techniques for rare-earth-based optical fibers and amplifiers
Author(s): Sylvain Girard; Marilena Vivona; Luciano Mescia; Arnaud Laurent; Youcef Ouerdane; Claude Marcandella; F. Prudenzano; Aziz Boukenter; Thierry Robin; Benoît Cadier; Emmanuel Pinsard; Marco Cannas; Roberto Boscaino
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Paper Abstract

Er/Yb doped fibers and amplifiers have been shown to be very radiation sensitive, limiting their integration in space. We present an approach including successive hardening techniques to enhance their radiation tolerance. The efficiency of our approach is demonstrated by comparing the radiation responses of optical amplifiers made with same lengths of different rare-earth doped fibers and exposed to gamma-rays. Previous studies indicated that such amplifiers suffered significant degradation for doses exceeding 10 krad. Applying our techniques significantly enhances the amplifier radiation resistance, resulting in a very limited degradation up to 50 krad. Our optimization techniques concern the fiber composition, some possible pre-treatments and the interest of simulation tools used to harden by design the amplifiers. We showed that adding cerium inside the fiber phosphosilicate-based core strongly decreases the fiber radiation sensitivity compared to the standard fiber. For both fibers, a pre-treatment with hydrogen permits to enhance again the fiber resistance. Furthermore, simulations tools can also be used to improve the tolerance of the fiber amplifier by helping identifying the best amplifier configuration for operation in the radiative environment.

Paper Details

Date Published: 23 February 2012
PDF: 7 pages
Proc. SPIE 8246, Free-Space Laser Communication Technologies XXIV, 82460Y (23 February 2012); doi: 10.1117/12.907238
Show Author Affiliations
Sylvain Girard, CEA, DAM, DIF (France)
Marilena Vivona, iXFiber SAS (France)
Lab. Hubert Curien, CNRS, Univ. Jean Monnet Saint-Etienne (France)
Univ. degli Studi di Palermo (Italy)
Luciano Mescia, Politecnico di Bari (Italy)
Arnaud Laurent, iXFiber SAS (France)
Youcef Ouerdane, Lab. Hubert Curien, CNRS, Univ. Jean Monnet Saint-Etienne (France)
Claude Marcandella, CEA, DAM, DIF (France)
F. Prudenzano, Politecnico di Bari (Italy)
Aziz Boukenter, Lab. Hubert Curien, CNRS, Univ. Jean Monnet Saint-Etienne (France)
Thierry Robin, iXFiber SAS (France)
Benoît Cadier, iXFiber SAS (France)
Emmanuel Pinsard, iXFiber SAS (France)
Marco Cannas, Univ. degli Studi di Palermo (Italy)
Roberto Boscaino, Univ. degli Studi di Palermo (Italy)


Published in SPIE Proceedings Vol. 8246:
Free-Space Laser Communication Technologies XXIV
Hamid Hemmati; Don M. Boroson, Editor(s)

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