Switching characteristics of three-core nonlinear directional couplers with variable coupling coefficient

Jinlong Wu, Qu Li, Guoliang Jin, Xianzhou Liu, Gangjun Liu

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The all-optical switching characteristics of three-core nonlinear directional waveguide couplers (NLDCs) with Gaussian type and exponential type variable coupling coefficient (VCC) are presented. Their transmission features are investigated numerically. It is shown that, for the three-core VCC NLDCs, the power can switch completely between guide 1 and guide 3; however 100% power output cannot be achieved for guide 2. The switching curves of three-core NLDCs with VCC are sharper than those of their two-core counterparts with same maximum coupling coefficient. It is also shown that the sidelobes in the post-switching region, which exist in the parallel nonlinear directional couplers, can be suppressed with three-core NLDC with VCC.

Original languageEnglish (US)
Pages (from-to)11-14
Number of pages4
JournalGuangxue Xuebao/Acta Optica Sinica
Issue number1
StatePublished - Jan 1 2005



  • All-optical switching
  • Guided wave and fiber optics
  • Three-core coupler
  • Variable coupling coefficient (VCC)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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