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Intermode light diffusion in multimode optical waveguides with rough surfaces.

S Stepanov1, E I Chaikina, T A Leskova

  • 1División de Física Aplicada, Centro de Investigación Científica y de Educación Superior de Ensenada, Km. 107 carretera Tijuana-Ensenada, Ensenada, 22860, México. steps@cicese.mx

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|June 30, 2005
PubMed
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This study analyzes light power diffusion in optical fibers with rough surfaces. Theoretical models show diffusion equations govern light propagation, agreeing with experimental results for multimode optical fibers.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Light power diffusion in multimode waveguides is crucial for signal integrity.
  • Surface roughness significantly impacts light propagation characteristics.

Purpose of the Study:

  • To theoretically analyze incoherent intermode light power diffusion in dielectric waveguides with rough surfaces.
  • To develop a model for light power diffusion in both slab and cylindrical waveguides.

Main Methods:

  • Theoretical analysis of light scattering from surface variations.
  • Development of partial differential equations to model angular light power profile evolution.
  • Comparison of theoretical predictions with experimental data for optical fibers.

Main Results:

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  • Light power diffusion in both 1D slab and 2D cylindrical waveguides follows 1D diffusion-type partial differential equations.
  • Effective conductivity and diffusion coefficients show linear dependencies on waveguide parameters.
  • Theoretical predictions align well with experimental observations in multimode optical fibers.

Conclusions:

  • Surface roughness-induced intermode power diffusion can be accurately modeled using diffusion equations.
  • The developed theoretical framework provides insights into light propagation in imperfect waveguides.
  • The study validates theoretical models against experimental data, enhancing understanding of optical fiber performance.