Abstract
Gain factor and output performance of erbium–praseodymium codoped ZBLAN double-clad
fiber lasers at
with different pumping designs were calculated and analyzed.
Single-end backward pumping with a highly reflective mirror butted against one fiber end
and dual-end pumping with Fresnel reflections from both fiber ends were found to be the
most efficient pumping designs. Ten-watt-level Er∕Pr:ZBLAN fiber lasers proved to be
achievable with recent diode laser and ZBLAN fiber technologies. Their corresponding
optimum fiber lengths for different pumping configurations were determined. It was also
found that fiber lasers with a flat evolution of gain factor can obtain the largest output
power. Experimental results of
and
fiber lasers showed very good agreement
with simulation results.
© 2006 Optical Society of America
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