4. Coupled-Mode Theory

Coupled mode theory

Modes and mode coupling

  • Modes orthonormality and completeness
  • Mode coupling and dielectric perturbative approach
  • Coupled-mode equations 

Directional couplers

  • Device structure (unperturbed --> perturbed)
  • Coupled-mode equations and key parametres
  • Solutions and phase-matching
  • Applications

Grating couplers

  • Device structure, co-directional and contra-directional (Bragg) coupling
  • Coupled-mode equations and key parametres
  • Solutions and phase-matching
  • Applications

Reading 

Chapter 13: §13.1,  §13.2, §13.3

Chapter 12: §12.4

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