Highly scalable, resonantly cladding-pumped, Er-doped fiber laser with record efficiency.
We report the performance of a resonantly cladding-pumped, Yb-free, Er-doped fiber laser. We believe this is the first reported resonantly cladding-pumped fiber-Bragg-grating-based, Er-doped, large-mode-area (LMA) fiber laser. The laser, pumped by fiber-coupled InGaAsP/InP laser diode modules at 1,532.5 nm, delivers approximately 48 W of cw output at 1,590 nm. It is believed to be the highest power ever reported from a Yb-free Er-doped LMA fiber. This fully integrated laser also has the optical-to-optical efficiency of approximately 57%, to the best of our knowledge, the highest efficiency reported for cladding-pumped unidirectionally emitting Er-doped laser.
Dubinskii
M
M
United States Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA. mdubinskiy@arl.army.mil
Zhang
J
J
Ter-Mikirtychev
V
V