Three-core nonlinear directional coupler with variable coupling coefficient

Gangjun Liu, Bin Ming Liang, Qu Li, Guo Liang Jin

Research output: Contribution to journalArticle

9 Scopus citations


Three core nonlinear directional couplers (TCNLDCs) with variable coupling coefficients (VCCs) are proposed. Their linear operation is examined analytically. Three types of VCC TCNLDCs are investigated numerically. Their transmission features are compared with those of their two-core counterparts. It is shown that the switching curves of VCC TCNLDCs are sharper than those of their two-core counterparts. Also the features of different types of VCC TCNLDCs are compared to each other and to the constant coupling coefficient (CCC) TCNLDC. It is found that the sidelobes in the postswitching region can be suppressed with VCC TCNLDCs and the peak transmission of VCC TCNLDCs is higher.

Original languageEnglish (US)
Pages (from-to)2930-2935
Number of pages6
JournalOptical Engineering
Issue number10
Publication statusPublished - Oct 2003
Externally publishedYes



  • Nonlinear coupler
  • Nonlinear waveguides
  • Switching nonlinear optics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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