Abstract
We report on the preparation and optical characteristics of an Yb3+ doped large core silica fiber with the active core prepared by glass phase-separation technology. The measurements show that the fiber has a high Yb3+ concentration of 9811 ppm by weight, a low background attenuation of 0.02dB/m and a strong absorption from Yb3+ about 5.5dB/m at 976 nm. The laser performance presents a high slope efficiency of 72.8% for laser emission at 1071nm within only 2.3m fiber length. It is suggested that the glass phase-separation technology shows great potential to prepare the heavily doped fibers with larger core and complex core structures.
© 2015 Optical Society of America
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