Ultralow quantum-defect eye-safe Er:Sc2O3 laser.
Resonantly pumped Er(3+):Sc(2)O(3) laser operation is achieved with a quantum defect (QD) of 1.5% at liquid nitrogen temperature. The laser, in-line pumped at 1535 nm, operated at 1558 nm with a slope efficiency of over 45%. This is believed to be the lowest QD eye-safe laser ever reported. CW output of over 3.3 W was obtained in this first experiment.
Ter-Gabrielyan
Nikolay
N
US Army Research Laboratory, 2800 Powder Mill Rd, Adelphi, Maryland 20783, USA.
Merkle
Larry D
LD
Ikesue
Akio
A
Dubinskii
Mark
M