Photodarkening rate in Yb-doped silica fibers.

  title={Photodarkening rate in Yb-doped silica fibers.},
  author={Joona J. Koponen and Mikko J S{\"o}derlund and Hanna J Hoffman and Dahv A. V. Kliner and Jeffrey P. Koplow and Mircea Hotoleanu},
  journal={Applied optics},
  volume={47 9},
Yb-doped fibers are widely used in laser applications requiring high average output powers and high-peak-power pulse amplification. Photodarkening (PD) is recognized as one limiting factor in these fibers when pumped with high-intensity radiation. We describe an approach for performing quantitative PD studies of fibers, and we present measurements of the rate of PD in Yb-doped single-mode fibers with varying inversion levels. The method is applicable to large-mode-area fibers. We observed a… CONTINUE READING
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