Abstract

The effective procedure for spectrum sparseness of natural oscillations of double-mirror open resonators (OR) is proposed. It is based on the placement of scatterers with a specially determined geometric profile on one of the mirrors surface, forming the single mode-selective reflector. This procedure is used to synthesize two profiles of these scatterers for OR with flat and cylindrical mirrors. We propose the rectangular metal bar and the echelette-corner reflector with three rectangular steps symmetric to the plane of resonator symmetry. These scatterers placed on the flat OR mirror provide a minimal effect on the spatial-frequency characteristics of the operating natural oscillation, and significantly reduce the Q-factor of most of the rest oscillations. The spectral characteristics of the OR with these inserts are calculated for excitation by the current source and the eigen mode of a supply waveguide. The possibility of significant decrease in the number of OR natural oscillations is shown, in comparison with the resonator without these scatterers. The effect of increasing the radiation Q-factor of operating oscillation is observed using the echelette-corner scatterer. The technique used to determine the scatterers geometric profile is suitable for spectrum sparseness of the OR of arbitrary dimensions with mirrors of any shapes.

中文翻译：

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在其中一个镜面上使用模式选择散射体的双镜开式谐振器自然振荡谱的稀疏性

摘要

提出了双镜开式谐振器（OR）自然振荡频谱稀疏的有效程序。它基于在其中一个镜面上放置具有特殊几何轮廓的散射体，形成单模选择反射器。此过程用于合成这些散射体的两个轮廓，用于 OR 与平面镜和柱面镜。我们提出了矩形金属棒和梯形角反射器，具有三个矩形台阶，对称于谐振器对称平面。放置在平面 OR 镜上的这些散射体对工作自然振荡的空间频率特性的影响最小，并显着降低了大多数其余振荡的 Q 因子。计算带有这些插件的 OR 的光谱特性，用于电流源的激发和电源波导的本征模式。与没有这些散射体的谐振器相比，显示了 OR 自然振荡数量显着减少的可能性。使用阶梯角散射体观察增加工作振荡的辐射Q因子的效果。用于确定散射体几何轮廓的技术适用于具有任何形状的镜子的任意维度的 OR 的光谱稀疏性。使用阶梯角散射体观察增加工作振荡的辐射Q因子的效果。用于确定散射体几何轮廓的技术适用于具有任何形状的镜子的任意维度的 OR 的光谱稀疏性。使用阶梯角散射体观察增加工作振荡的辐射Q因子的效果。用于确定散射体几何轮廓的技术适用于具有任何形状的镜子的任意维度的 OR 的光谱稀疏性。