Engholm M, Jelger P, Laurell F, Norin L
Fiber Optic Valley AB, SE-824 43 Hudiksvall, Sweden.
Opt Lett. 2009 Apr 15;34(8):1285-7. doi: 10.1364/ol.34.001285.
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.
我们表明，通过共掺杂铈可以大大提高掺镱光纤激光器的光暗化电阻率。有人认为，玻璃中氧化还原对Ce(3+)/Ce(4+)的共存为捕获与空穴和电子相关的色心提供了途径，这些色心是导致掺镱光纤激光器中诱导光损耗的原因。
