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问5:光纤是如何进行分类的?(续)答:②色散对光信号的影响。光纤的色散导致光信号的波形失真,表现为脉冲展宽,它是光纤的时域特性。脉冲展宽也称为脉冲信号的延时失真,这种延时失真的大小是由光纤的色散特性所决定的。对于数字通信系统,光信号的脉冲展宽是一项重要指标。脉冲展宽过大就会引起相邻脉冲间隙减小,相邻脉冲将会产生部分重叠而使再生中继器发生脉冲判断错误,从而使误码率增多,限制了光纤的传输
Q5: How are fibers classified? (Continued) Answer: 2) The effect of dispersion on optical signals. The dispersion of the optical fiber causes the waveform distortion of the optical signal, manifested as pulse broadening, which is the time domain characteristic of the optical fiber. Pulse stretching is also called the delay distortion of the pulse signal. The size of this delay distortion is determined by the dispersion characteristics of the fiber. For digital communication systems, pulse broadening of optical signals is an important indicator. Pulse broadening is too large will cause the adjacent pulse to reduce the gap between the adjacent pulse will have some overlap so that the regenerative pulse generator to judge the error, so that bit error rate increased, limiting the fiber transmission