Abstract

We report the demonstration of the first, to our knowledge, cladding-pumped continuous-wave Yb3+-doped phosphate-glass fiber laser. Phosphate hosts are of interest because they can be much more heavily doped than silica, and because of the possibility that they may have a higher photodarkening threshold. In an 84.6cm double-clad fiber doped with 12wt.% of Yb2O3 and laser-diode pumped at 940nm, nearly 20W of single-mode 1.07μm output power was generated with 60.2W of absorbed pump power. The measured dependence of the output power on pump power is in excellent agreement with simulations.

© 2006 Optical Society of America

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