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问1:光纤是如何进行分类的?答:(1)根据传输的模数分类根据传输的模数,光纤可以分为单模光纤(SinglModeFiber)和多模光纤(MultiModeFiber)。单模光纤的芯径很小,在给定的工作波长上只能以单一模式传输。单模光纤芯径为8～10μm,纤芯外面包围着一层折射率比纤芯折射率低的包层,以确保光信号在纤芯内传送。单模光纤的传输频带宽,传输容量大。光信号可以沿着光纤的轴向传播,因此光信号的损耗小,离散也很小,单模光纤主干布线的最大距离为3000m
Question 1: How are optical fibers classified? Answer: (1) According to the transmission modulus classification According to the transmission modulus, the optical fiber can be divided into single-mode optical fiber (SinglModeFiber) and multimode fiber (MultiModeFiber). Single mode fiber core diameter is small, at a given wavelength can only be a single mode of transmission. Single-mode fiber core diameter of 8 ~ 10μm, outside the core surrounded by a layer of refractive index lower than the refractive index of the core cladding to ensure that the optical signal transmitted within the core. Single-mode fiber transmission bandwidth, transmission capacity. The optical signal can propagate along the axial direction of the optical fiber, so the optical signal loss is small, the dispersion is small, the maximum distance of the single-mode optical fiber main wiring is 3000m