Propagation of Light in Waveguide Systems with Random Imperfections(Special Issue on Problems of Random Scattering and Electromagnetic Wave Sensing)

概要

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The power coupling coefficients between cores of waveguide systems with random geometrical imperfections along the fiber axis are determined by comparing numerical solutions of the coupled mode equations with numerical solutions of the coupled power equations and the dependence of the power coupling coefficient on the correlation length with respect to the propagation constants of modes is clarified. When the correlation length D is small the power coupling coefficient is proportional to κ^2D where κ is the mean mode coupling coefficient and is independent of the fluctuation of the propagation constants. For sufficiently large D the power coupling coefficient d_c decreases in proportion to D^<-1> with increasing D and when D → ∞, d_c → 0. Then the dependence of the power coupling coefficient on the mode coupling coefficient and the fluctuation of the propagation constants δβ is expressed as a function of a single variable κ/δβ.
社団法人電子情報通信学会の論文
2000-12-25