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基于Marcatili近似理论,给出了一种矩形光波导Ey00模模场的近似表达,根据平面波角谱理论,推导出了矩形光波导Ey00模衍射场的空间频谱表达式,探讨了其x轴方向上的空间频谱分布特性,分析了矩形光波导Ey00模在x,y轴方向上的光传输因子M2,并采用方形桶桶中功率对矩形波导Ey00模空间频率半宽度进行数值分析,得到了由方形桶桶中功率定义的矩形光波导Ey00模空间频率半宽度随归一化频率变化的关系曲线。
Based on the Marcatili approximation theory, an approximate expression of the Ey00 mode field of a rectangular optical waveguide is given. According to the plane wave angle spectrum theory, the spatial spectral expression of the Ey00 mode diffraction field of a rectangular optical waveguide is deduced. , The optical transmission factor (M2) in the direction of x and y axes of the rectangular waveguide Ey00 was analyzed and the half-width of the frequency of the rectangular waveguide Ey00 mode space was numerically analyzed by using the power in a square barrel. Barrel barrel power definition rectangular waveguide Ey00 mode space frequency half width with the normalized frequency curve.