We show that erbium ions placed in an annulus within the fiber core make 980-nm-pumped amplifiers insensitive to variations in pump power distribution among the spatial modes of the fiber and make 1480-nm-pumped amplifiers insensitive to variations in fiber parameters.
|Original language||English (US)|
|Number of pages||3|
|State||Published - Jul 15 1993|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics