Abstract
Heavily Yb-doped (14300 ppm) preforms and fibers were prepared by the
sol-gel method and dip coating-rapid thermal annealing technique. Optical
properties of these preforms and fibers were measured and discussed. A fiber
laser at a 1053-nm wavelength was realized and its slope efficiency was measured
to be 88.4%. The excellent performance of the fiber laser and repeatability
show that the novel approach described in this paper is capable of providing
low-cost high-level rare earth-doped fibers for amplifiers and fiber lasers.
© 2008 IEEE
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