DWDM Generates Background

The relationship between the communication transmission network and the business has become more and more complicated under the circumstance of the sharply rising business volume. The original TDM (optical fiber single-wave transmission and time division multiplexing) cannot adapt to the needs of new technologies. The maximum rate of single-wavelength optical fiber transmission for commercial applications is 40Gbits/s, and it is expensive. TDM technology is difficult to adapt to complex networks and business relationships. The optical fiber multi-wave transmission technology that uses pure optical devices for long-wave scheduling breaks through the limit of the processing speed of electronic devices. On the basis of SDH technology, the optical fiber transmission capacity can be greatly improved. The current commercial application rate of dense optical wave multiplexing (DWDM) technology (DWDM) technology (also known as OTN technology) has reached 3.2 Tbits/s, which means that the communication network can be upgraded and evolved smoothly.

The first proposer of DWDM technology is Lucent Company, whose Chinese translation is intensive light wave multiplexing. DWDM technology was proposed in 1991. Specifically, it refers to the ability to combine a set of optical wavelengths for transmission with one optical fiber, which is a laser technology used to increase the bandwidth on the existing optical fiber backbone network. It can also refer to the close spectral spacing of multiplexing a single fiber carrier in a specific fiber in order to achieve the required performance during transmission. And under certain information transmission, you can also try to reduce the number of optical fibers required. In recent years, the development of DWDM technology has received extensive attention, and the application of DWDM technology in communications will be more extensive in the future.