光波分復用的定義：是在一根光纖中同時傳輸多波長光信號的技術。• 基本原理：在發送端將不同波長的光信號復用，并耦合到同一根光纖中進行傳輸，在接收端又將組合波長解復用，并進一步處理，恢復出原信號后，送入不同的終端。
基本光纖類型• ITU G652 普通單模光纖(SMF)應用窗口：1310nm,衰耗值：0.34dB/公里1510nm,衰耗值：0.2dB/公里ITU G653色散位移光纖(DSF)• ITU G655非零色散位移光纖
Since the advent of optical communications, a great technological effort has
been devoted to the exploitation of the huge bandwidth of optical fibers. Start-
ing from a few Mb/s single channel systems, a fast and constant technological
development has led to the actual 10 Gb/s per channel dense wavelength di-
vision multiplexing (DWDM) systems, with dozens of channels on a single
fiber. Transmitters and receivers are now ready for 40 Gb/s, whereas hundreds
of channels can be simultaneously amplified by optical amplifiers.
