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本文提出一种适合于截止点附近计算含金属覆盖层介质波导的近似解析方法，详细地讨论了在截止点附近的光波导的模式传播特性和光电调制特性，并结合有效折射率方法讨论了截止型脊形波导调制器的截止条件
In this paper, we propose an approximate analytical method suitable for the calculation of dielectric waveguides with metal cladding in the vicinity of the cut-off point. The mode propagation characteristics and optical modulation characteristics of optical waveguides near the cut-off point are discussed in detail. The effective refractive index Type ridge waveguide modulator cut-off conditions