采用有限差分波束传输法（FD-BPM）设计了一种66%模式转换、合并器。
The finite difference beam propagation method(FD-BPM)is used to design a device of 66% MMI-converter-Combiners.
交替方向隐式有限差分波束传输法被用来分析二维限制对称多模波导干涉耦合器。
The alternate-direction implicit finite difference beam propagation method (FD-BPM) is used to analyze the two-dimensional (2D) symmetrical multimode interference (MMI) couplers.
交替方向隐式有限差分波束传输法被用来分析二维限制对称多模波导干涉耦合器。
The alternate-direction implicit finite difference beam propagation method (FD-BPM) is used to analyze the two-dimensional (2D) symmetrical multimode interference (MMI) couplers.
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