Mendlovic D, Goldenberg E, Ruschin S, Dror J, Croitoru N
Appl Opt. 1989 Feb 15;28(4):708-12. doi: 10.1364/AO.28.000708.
The problem of transmitting CO(2) laser radiation through metallic or metallic with inner dielectric coating (metallic-dielectric) bent hollow cylindrical waveguides is investigated using a ray model. Computer calculations of transmission as a function of the geometrical dimensions of the waveguide are performed. The coupling of laser radiation at the entrance of the waveguide is also taken into account. The theoretical calculated transmission is compared with previously published experimental data and good agreement is obtained for a large range of curvatures. The devised ray model contributes to a better understanding of the role of the dielectric layer in the metallic-dielectric waveguide, increasing the transmission of the radiation. The calculation of the transmission as a function of the radius of the cross section of the waveguide shows that, for a best metallic-dielectric waveguide, an optimal cross-sectional diameter appears where the transmitted energy is maximum. The method presented will be of value as a tool in the design of hollow cylindrical waveguides.
利用射线模型研究了通过金属或带有内部介质涂层的金属（金属 - 介质）弯曲空心圆柱波导传输二氧化碳激光辐射的问题。进行了作为波导几何尺寸函数的传输的计算机计算。还考虑了波导入口处激光辐射的耦合。将理论计算的传输与先前发表的实验数据进行比较，在大范围的曲率下获得了良好的一致性。所设计的射线模型有助于更好地理解介质层在金属 - 介质波导中的作用，提高辐射的传输。作为波导横截面半径函数的传输计算表明，对于最佳的金属 - 介质波导，存在一个使传输能量最大的最佳横截面直径。所提出的方法作为空心圆柱波导设计的工具将具有价值。
