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单波长光纤传输系统的速率已达到10 Gbit/s,但是当速率进一步提高时,会遇到严重的技术障碍;而采用多波长波分复用系统来大幅度提高光纤传输系统的速率与容量已经没有什么实质性的技术限制.光纤最突出的优点之一就是其巨大的固有带宽,而光纤特性中的衰减、色散、极化模色散和非线性效应会对传输速率与容量产生限制,研究人员已找到相应的实用技术来克服这些限制.从过去几年光纤传输技术的发展可以看出两个主要的趋势,即不断改进的WDM技术和改进模拟信号技术用于光纤数字传输.
Single-wavelength optical fiber transmission systems have reached 10 Gbit / s, but serious technical obstacles are encountered when the rate is further increased. The use of multi-wavelength WDM systems to dramatically increase the speed and capacity of optical fiber transmission systems There is no substantive technical limitations.One of the most prominent advantages of optical fiber is its huge intrinsic bandwidth, and fiber characteristics of the attenuation, dispersion, polarization mode dispersion and nonlinear effects of transmission rate and capacity constraints, the researchers Corresponding practical technologies have been found to overcome these limitations.From the development of optical fiber transmission technology in the past few years, two main trends can be seen, namely, the continuous improvement of WDM technology and the improvement of analog signal technology for digital optical fiber transmission.