Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping.
We show that the photodarkening resistivity of ytterbium-doped fiber lasers can be greatly improved by cerium codoping. It is suggested that the coexistence of the redox couple Ce(3+)/Ce(4+) in the glass provides means for trapping both hole- and electron-related color centers that are responsible for the induced optical losses in Yb-doped fiber lasers.
Fiber Optic Valley AB, SE-824 43 Hudiksvall, Sweden. Magnus.Engholm@fiberopticvalley.com
M
M
Engholm
P
P
Jelger
F
F
Laurell
L
L
Norin