0引言随着宽带中国战略的正式公布,未来我国网络发展前景将更加开阔,光缆的使用也更加广泛,但光缆在布线过程中的衰减故障(即衰减过大)一直困扰着我们。为此,本文从整个光缆布线过程入手对光缆衰减故障成因进行分析,并给出解决方法。1光缆接续损耗增大光缆在布线后衰减增大的原因之一是光缆接续损耗劣化。1.1光纤结构参数不匹配模场直径、包层直径、同心度误差、包层不圆度以及相对折射率等单模光纤结构参数不匹配均会导 0 Introduction With the formal announcement of broadband strategy in China, the future of China’s network development will be more open, the use of optical cables are more extensive, but the optical cable attenuation in the wiring process failure (ie attenuation is too large) has been plagued us. Therefore, this paper analyzes the causes of fiber cable attenuation failures and gives the solutions from the entire optical cable routing process. An increase of optical fiber connection loss One of the reasons that the attenuation of optical fiber cable increases after wiring is that the optical fiber connection loss is deteriorated. 1.1 fiber structure parameters do not match the mode field diameter, cladding diameter, concentricity error, cladding non-circularity and relative refractive index and other single-mode fiber structure parameters do not match