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Nonlinear pulse dynamics in multimode silicon core optical fibers.

Anna C Peacock1, Priyanth Mehta, Peter Horak

  • 1Optoelectronics Research Centre, University of Southampton, Southampton, UK. acp@orc.soton.ac.uk

Optics Letters
|February 6, 2013
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Summary

Numerical modeling shows that while higher-order modes slightly alter spectral shape in silicon core optical fibers, the fundamental mode carries most power, not impacting spectral broadening width.

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Area of Science:

  • Optics
  • Materials Science
  • Photonics

Background:

  • Silicon core optical fibers offer unique nonlinear optical properties.
  • Understanding multimode propagation is crucial for optimizing fiber performance.
  • Nonlinear broadening is a key phenomenon in optical fibers.

Purpose of the Study:

  • To investigate multimode propagation dynamics in silicon core optical fibers.
  • To analyze the influence of higher-order modes on spectral evolution.
  • To determine the power distribution among different modes during propagation.

Main Methods:

  • Numerical modeling using coupled mode equations.
  • Simulations of spectral evolution in two distinct silicon core fibers.
  • Analysis of power distribution between fundamental and higher-order modes.

Main Results:

  • The fundamental mode carries the majority of the coupled power in both fibers.
  • Higher-order modes contribute minimally to the overall power propagation.
  • A small contribution from higher-order modes influences spectral shape but not broadening width.

Conclusions:

  • Fundamental mode dominance is key in silicon core fiber propagation.
  • Higher-order modes have a nuanced effect on spectral characteristics.
  • These findings aid in designing and utilizing silicon core fibers for nonlinear applications.