title: Resonantly cladding-pumped Yb-free Er-doped LMA fiber laser with record high power and efficiency.
abstract: We report the results of our power scaling experiments with resonantly cladding-pumped Er-doped eye-safe large mode area (LMA) fiber laser. While using commercial off-the-shelf LMA fiber we achieved over 88 W of continuous-wave (CW) single transverse mode power at ~1590 nm while pumping at 1532.5 nm. Maximum observed optical-to-optical efficiency was 69%. This result presents, to the best of our knowledge, the highest power reported from resonantly-pumped Yb-free Er-doped LMA fiber laser, as well as the highest efficiency ever reported for any cladding-pumped Er-doped laser, either Yb-co-doped or Yb-free.
authors: US Army Research Laboratory, 2800 Powder Mill Rd, Adelphi, Maryland 20783, USA.
authors: Jun
authors: J
authors: Zhang
authors: Viktor
authors: V
authors: Fromzel
authors: Mark
authors: M
authors: Dubinskii