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We investigated the efficiencies of two different approaches to increase the radiation hardness of optical amplifiers through development of improved rare-earth (RE) doped optical fibers. We demonstrated the efficiency of codoping with Cerium the core of Erbium/Ytterbium doped optical fibers to improve their radiation tolerance. We compared the γ-rays induced degradation of two amplifiers with comparable pre-irradiation characteristics (~19 dB gain for an input power of ~10 dBm): first one is made with the standard core composition whereas the second one is Ce codoped. The radiation tolerance of the Ce-codoped fiber based amplifier is strongly enhanced. Its output gain decrease is limited to ~1.5 dB after a dose of ~900 Gy, independently of the pump power used, which authorizes the use of such fiber-based systems for challenging space missions associated with high total doses. We also showed that the …
Optical Society of America
Publication date: 
9 Apr 2012

Sylvain Girard, Marilena Vivona, Arnaud Laurent, Benoît Cadier, Claude Marcandella, Thierry Robin, Emmanuel Pinsard, Aziz Boukenter, Youcef Ouerdane

Biblio References: 
Volume: 20 Issue: 8 Pages: 8457-8465
Optics express