光通信采用的光复用技术主要有两种：时分复用（ＴＤＭ）和波分复用（ＷＤＭ）技术。对于ＴＤＭ来说，使用单一波长的光信号，光纤带宽易于控制；但缺点是传输容量要进一步增加时，必须把光脉冲压缩得更窄，就需有更高速和精密的光器件去保证。对于ＷＤＭ来说，各信道的速率相 There are two main types of optical multiplexing used in optical communications: time division multiplexing (TDM) and wavelength division multiplexing (WDM). For TDM, the use of a single wavelength optical signal, the optical fiber bandwidth is easy to control; but the disadvantage is that the transmission capacity to further increase, the optical pulse must be compressed more narrow, you need to have higher speed and precision optical devices to ensure. For WDM, the rate of each channel phase