Spatiotemporal characterization of nonlinear intermodal interference between selectively excited modes of a few-mode fiber

@article{Dacha2020SpatiotemporalCO,
  title={Spatiotemporal characterization of nonlinear intermodal interference between selectively excited modes of a few-mode fiber},
  author={Sai Kanth Dacha and Thomas E. Murphy},
  journal={Optica},
  year={2020}
}
Nonlinear propagation of signals in single-mode fiber is well understood, and is typically observed by measuring the temporal profile or optical spectrum of an emerging signal. In multimode fibers, the nonlinearity has both a spatial and a temporal element, and a complete investigation of the interactions between propagating modes requires resolving the output in both space and time. We report here spatiotemporal measurements of two nonlinear interacting LP$_{0m}$ modes of a step-index few-mode… 

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