What is DWDM and how to use it?

What is DWDM and how to use it?


DWDM is an acronym that sands for Dense Wavelength Division Multiplexing, a form of optical technology that is used to enhance the bandwidth of an existing fiber optical network. It works by blending together and broadcasting various signals at the same time and at different wavelengths on a single fiber. Essentially, a single fiber is turned into several fibers; for example, if DWDM was used to combine eight OC-48 signals into a single fiber, the carrying capacity of that single fiber would be increased from 2.5 Gb/s to 20Gb/s. Thanks to this form of optical technology, one fiber can have the ability to transmit information at speeds of up to 400Gb/s.

The Benefits of DWDM

DWDM is protocol and bit-rate independent, which is the primary benefit of this type of technology. Networks that utilize DWDM have the ability to send data in Ethernet, IP, SONET, and ATM, and they can manage bit rates that range between 100 Mb/s. As a result, networks that are based on DWDM technology have the ability to carry multiple forms of traffic at varying speeds over optical channels.


DWDM technology increases the bandwidth of existing fiber networks by bringing together and transmitting various signals of different wavelengths at the same time on a single fiber. This type of technology establishes several virtual fibers, thereby increasing the capacity of the physical medium. 

Read more about CWDM here: CWDM Explained (

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