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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 37,
  • Issue 4,
  • pp. 1273-1279
  • (2019)

Investigation of Intermodal Nonlinear Signal Distortions in Few-Mode Fiber Transmission

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Abstract

We present an experimental investigation of the Q-factor penalty due to intra and intermodal nonlinear signal distortions on 24.5 GBaud 16-quadratic-amplitude modulation based spatial super channel in a 36 km few-mode fiber. The results show that intermodal nonlinear signal degradations, caused by interfering spectral components separated by more than 17 nm, lead to similar Q-factor penalties as intramodal nonlinear signal degradations, originating in spectral components of less than 1 nm separation. We further compare the experimentally observed intra and intermodal nonlinear signal degradations with an analytical nonlinear Gaussian noise model and find a strong agreement between the two, validating the model as a computationally inexpensive tool for the design of few-mode fiber-based transmission systems.

© 2019 IEEE

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