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1前言目前,包括CATV光纤线路在内的光通信系统所用的光纤,都是采用在石英(硅Si)玻璃中掺杂一些元素,使纤芯截面形成预期的折射率分布的折面图形状,使用折射率高的纤芯来实现光的波导传送的。厂家为了实现设计的传送性能,如:多模(MM)、单模(SM)和折射率的突变阶跃(SI)型、渐变(G
1 Preface At present, optical fibers used in optical communication systems including CATV optical fiber lines are all in the form of a zigzag pattern doped with some elements in quartz (Si) glass to make the core cross section have the expected refractive index profile, The use of a high refractive index of the core to achieve the optical waveguide transmission. Manufacturers to achieve the design of the transmission performance, such as: multimode (MM), single mode (SM) and refractive index of the sudden step (SI) type, gradient