Capacity Analysis of Signaling on the Continuous Spectrum of Nonlinear Optical Fibers

Iman Tavakkolnia, Majid Safari

Research output: Contribution to journalArticlepeer-review

Abstract

This paper investigates the capacity of signaling on the continuous spectrum (CS) of optical fibers as defined by nonlinear Fourier transform (NFT). The channel model of such NFT-based optical fiber communication systems is studied based on the behavior of the propagated optical signal in time domain for an asymptotically long fiber length. The derived channel model is validated using simulation for different scenarios of practical interest. An important characteristic of the channel in nonlinear spectral domain is the strong dependency of noise to signal. A variance normalizing transform is applied as a tool to obtain an estimate on the capacity of the underlying channel. The results predict a remarkable capacity for signaling on CS which can be utilized as an extra degree of freedom along with discrete spectrum (i.e., soliton transmission). It is further observed that the channel capacity of signaling on CS saturates at high signal power despite the linearizing capability of NFT.
Original languageEnglish
Pages (from-to)2086 - 2097
Number of pages12
JournalJournal of Lightwave Technology
Volume35
Issue number11
DOIs
Publication statusPublished - 12 Feb 2017

Keywords

  • continuous spectrum
  • inverse scattering
  • noise statistics
  • nonlinear fourier transform
  • opticle fiber capacity
  • optical fibre communication
  • Variance normalizing transform

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