Origin of thermal modal instabilities in large mode area fiber amplifiers.

@article{Ward2012OriginOT,
  title={Origin of thermal modal instabilities in large mode area fiber amplifiers.},
  author={Benjamin G. Ward and Craig Robin and Iyad A. Dajani},
  journal={Optics express},
  year={2012},
  volume={20 10},
  pages={11407-22}
}
We present a dynamic model of thermal modal instability in large mode area fiber amplifiers. This model allows the pump and signal optical intensity distributions to apply a time-varying heat load distribution within the fiber. This influences the temperature distribution that modifies the optical distributions through the thermo-optic effect thus creating a feedback loop that gives rise to time-dependent modal instability. We describe different regimes of operation for a representative fiber… CONTINUE READING
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