Abstract
We have studied the effect of gamma-radiation on the small signal gain
and on the noise figure of several EDFAs with similar characteristics and
based on special highly Er-doped fibers. Those fibers were fabricated using
direct nanoparticle deposition technology, with different Er$^{3 +}$ doping levels. The results show
that the use of this technology allows improving the EDFA's radiation tolerance
by increasing the concentration of Er$^{3
+}$ ions provided this is not accompanied with higher concentrations
of other dopants, which influence the radiation sensitivity of the fiber.
© 2009 IEEE
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