The application of complex Pade approximants to reflection at optical waveguide facets

@article{ElRefaei2000TheAO,
  title={The application of complex Pade approximants to reflection at optical waveguide facets},
  author={H. H. El-Refaei and I. B. Betty and David O Yevick},
  journal={IEEE Photonics Technology Letters},
  year={2000},
  volume={12},
  pages={158-160}
}
We demonstrate that the numerical instabilities associated with the use of the standard real Pade approximation for the reflection operator can be avoided through either a complex Pade expression or a branch-cut rotation in the complex plane. 

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