Phosphate-core silica-clad Er/Yb-doped optical fiber and cladding pumped laser.
We present a composite optical fiber with a Er/Yb co-doped phosphate-glass core in a silica glass cladding as well as cladding pumped laser. The fabrication process, optical properties, and lasing parameters are described. The slope efficiency under 980 nm cladding pumping reached 39% with respect to the absorbed pump power and 28% with respect to the coupled pump power. Due to high doping level of the phosphate core optimal length was several times shorter than that of silica core fibers.
O N
ON
Egorova
S L
SL
Semjonov
V V
VV
Velmiskin
Yu P
YP
Yatsenko
S E
SE
Sverchkov
B I
BI
Galagan
B I
BI
Denker
E M
EM
Dianov