Mode-locking in vertical external-cavity surface-emitting lasers with type-II quantum-well configurations

  title={Mode-locking in vertical external-cavity surface-emitting lasers with type-II quantum-well configurations},
  author={Isak Kilen and Stephan W. Koch and J{\"o}rg Hader and Jerome V. Moloney},
  journal={Applied Physics Letters},
A microscopic study of mode-locked pulse generation is presented for vertical external-cavity surface-emitting lasers utilizing type-II quantum well configurations. The coupled Maxwell semiconductor Bloch equations are solved numerically where the type-II carrier replenishment is modeled via suitably chosen reservoirs. Conditions for stable mode-locked pulses are identified allowing for pulses in the \unit[100]{fs} range. Design strategies for type-II configurations are proposed that avoid… 
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