Abstract.
Two types of nonlinear couplers exhibit identical coupling behaviors if their corresponding characteristic parameters and linear mismatches are of equal values but opposite signs. Complete power transfer can be attained in a nonlinear coupler when their characteristic parameters, linear mismatch and the input power satisfy an equation. For a mismatch asymmetrical nonlinear coupler, only one input power can lead to the complete power transfer. It leads to some new applications of the nonlinear coupler. The conditions for the stable and unstable equilibrium of the coupler are presented, they depend on the nonlinear asymmetry and linear mismatch. The impact of the nonlinear asymmetry on the switching characteristics is discussed. For a slight asymmetry or mismatch nonlinear coupler, the switching power can be shifted by means of varying the nonlinear symmetry or the linear mismatch while the switching features remain nearly unchanged. The impact of the mismatch on the operation of the coupler can be counteracted by the asymmetry of the nonlinearity. When the nonlinear asymmetry is high, the nonlinear coupler exhibits good limiting characteristics but not switching characteristics.
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Received: 22 August 2000 / Published online: 7 February 2001
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Wang, Y., Lee, C. Effects of the linear mismatch and nonlinear asymmetry in the nonlinear coupler . Appl Phys B 72, 417–424 (2001). https://doi.org/10.1007/s003400100495
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DOI: https://doi.org/10.1007/s003400100495