On the beam profile and beam quality of gain-guided index-antiguided fibers with finite cladding boundary

@article{Yarandi2011OnTB,
  title={On the beam profile and beam quality of gain-guided index-antiguided fibers with finite cladding boundary},
  author={Parisa Gandomkar Yarandi and Krishna Mohan Gundu and Arash Mafi},
  journal={Journal of The Optical Society of America B-optical Physics},
  year={2011},
  volume={28},
  pages={2430-2435}
}
The beam quality factor M2 for the fundamental LP01 mode of a step-index fiber with a finite cladding diameter is calculated in the presence of gain, in a closed form, as a function of the complex generalized V number. It is shown that the conventional infinite cladding diameter approximation cannot be used for index-antiguided gain-guided fibers, and the rigorous analysis presented in this paper is required for accurate prediction of the beam quality factor, as reported in recent experimental… 

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