光纤通信是将电信号转换成光脉冲沿光纤维传输,它比用常规的电缆传输具有以下优点: 1.信号的衰减小,因此,放大或中继距离可以很长。 2.光纤传输的信息量大,一根光纤可传输2,000个模拟电话信息。 3.大多数光纤是用价廉的硅土制成,目前每公里光纤价为1,000英镑(约为人民币3,400元)或更多一点,但当大批制作时,将降低到每公里25英镑(约为人民币85元)以下。 Optical fiber communication converts optical signals into optical pulses and transmits them along the optical fiber. Compared with conventional optical fiber transmission, optical communication has the following advantages: 1. The signal attenuation is small, so the amplification or relay distance can be long. Fiber optic transmission of large amounts of information, a fiber optic transmission of 2,000 analog phone messages. 3. Most of the fibers are made of cheap silica, which is currently at 1,000 pounds per kilometer (about 3,400 yuan) or more, but will be reduced to 25 pounds per kilometer For 85 yuan) the following.