Introduction To DWDM

DWDM can combine and transmit different wavelengths simultaneously in the same fiber. In order to be effective, one fiber is converted into multiple virtual fibers. So, if you plan to multiplex 8 optical fiber carriers (OC), that is, to transmit 8 signals in one optical fiber, the transmission capacity will be increased from 2.5Gb/s to 20Gb/s. Data was collected in March 2013. Due to the use of DWDM technology, a single fiber can transmit more than 150 light waves of different wavelengths at the same time, and the maximum speed of each light wave can reach a transmission rate of 10Gb/s. As manufacturers add more channels to each fiber, terabits-per-second transmission speeds are just around the corner.

A key advantage of DWDM is that its protocol and transmission speed are independent. The DWDM-based network can transmit data using IP protocol, ATM, SONET/SDH, and Ethernet protocols, and the data traffic processed is between 100Mb/s and 2.5Gb/s. In this way, DWDM-based networks can transmit different types of data traffic at different speeds on one laser channel. From a QoS (Quality of Service) point of view, DWDM-based networks can quickly respond to customers' bandwidth requirements and protocol changes in a low-cost manner.