What is DWDM Network?

With the continuous evolution of the Internet and digital communication, coupled with the growing demand for bandwidth, DWDM technology has become an indispensable element. By constructing DWDM networks, we can achieve the transmission of different wavelength signals within the same optical fiber, with the ability to cover ultra-long distances ranging from hundreds to thousands of kilometers. DWDM networks, characterized by their outstanding ultra-long distance transmission performance and the capability to transmit multiple wavelength signals within a single optical fiber, have become a crucial component in the realms of the Internet and communication.

What is DWDM Technology?

Dense Wavelength Division Multiplexing (DWDM) is an optical transmission technology that achieves high bandwidth and long-distance data transmission by simultaneously transmitting multiple different wavelengths of signals over a single optical fiber. The wavelength bands of DWDM are typically divided into the C-band (1530 nanometers to 1565 nanometers) and the L-band (1565 nanometers to 1625 nanometers). The wavelength spacing refers to the distance between adjacent wavelengths, and DWDM usually employs tight wavelength spacing, with wavelength intervals of 0.4nm, 0.8nm, and 1.6nm. This tight wavelength spacing enables the simultaneous transmission of a large amount of data streams over a single optical fiber, thereby achieving high bandwidth and high-capacity optical fiber transmission. DWDM modules are typically divided into regular DWDM modules and tunable modules, differing in that regular DWDM modules have fixed wavelengths, while tunable modules feature adjustable wavelengths.