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.

Radiation hardening techniques for rare-earth-based optical fibers and amplifiers / Girard, Sylvain; Vivona, Marilena; Mescia, Luciano; Laurent, Arnaud; Ouerdane, Youcef; Marcandella, Claude; Prudenzano, Francesco; Boukenter, Aziz; Robin, Thierry; Cadier, Benoît; Pinsard, Emmanuel; Cannas, Marco; Boscaino, Roberto. - STAMPA. - 8246:(2012). (Intervento presentato al convegno Conference on Free-Space Laser Communication Technologies XXIV tenutosi a January 24-26, 2012 nel San Francisco, CA) [10.1117/12.907238].

Radiation hardening techniques for rare-earth-based optical fibers and amplifiers

Luciano Mescia;Francesco Prudenzano;
2012-01-01

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.
2012
Conference on Free-Space Laser Communication Technologies XXIV
978-0-8194-8889-3
Radiation hardening techniques for rare-earth-based optical fibers and amplifiers / Girard, Sylvain; Vivona, Marilena; Mescia, Luciano; Laurent, Arnaud; Ouerdane, Youcef; Marcandella, Claude; Prudenzano, Francesco; Boukenter, Aziz; Robin, Thierry; Cadier, Benoît; Pinsard, Emmanuel; Cannas, Marco; Boscaino, Roberto. - STAMPA. - 8246:(2012). (Intervento presentato al convegno Conference on Free-Space Laser Communication Technologies XXIV tenutosi a January 24-26, 2012 nel San Francisco, CA) [10.1117/12.907238].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/51993
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