Passive DWDM system
Cost saving: Compared with the active DWDM backbone network equipped with fiber amplifiers and dispersion compensators, passive DWDM can construct high-speed transmission lines with high channel capacity at a lower cost.
Simple to use: Passive DWDM is a plug-and-play system that is simple and convenient to use.
However, passive DWDM systems also have shortcomings in the following aspects.
Scalability: Passive DWDM system has a limited number of wavelength channels. If you want to expand the network, you must use more passive DWDM equipment, which will increase the difficulty of system management.
Active DWDM system
The active DWDM system supports more wavelength channels, so the bandwidth is larger and the utilization rate of the optical fiber is higher. In addition, the active DWDM system is easier to manage, users can adjust the channel wavelength online without shutting down the system, and the expansion of the active DWDM system is easier.
Compared with passive DWDM systems, active DWDM systems have longer transmission distances and higher deployment costs. In addition, active DWDM systems also use fiber amplifiers, dispersion compensators and other equipment, and their deployment is more complicated than passive DWDM systems.
