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What is WDM and how does it work?

December 24 , 2021

Main reasons for choosing DWDM multiplexer/multiplexer


With the advent of the Internet, there is a huge influx of data. Although this is good for businesses because data is helpful in many ways, dealing with big data is a challenge. Efficient and powerful data transmission speed seems inevitable.


In order to solve the paradox of increasing bandwidth with less expenditure, DWDM Mux/Demux is the perfect choice. This is designed to be able to transmit even ultra-large-capacity data traffic in the telecommunications network. All of these have a high level of efficiency and higher speed!


An excellent solution to solve the explosive growth of access network bandwidth!


What is WDM and how does it work?


WDM stands for Wavelength Division Multiplexing, which is a process of multiplexing various light waves into a single signal that can be transmitted through optical fibers.


However, the optical signal indexed into a single signal is split into different light waves at the receiver end. There are multiple versions: Coarse Wavelength Division Multiplexing (CWDM MUX DEMUX) and Dense Wavelength Division Multiplexing (DWDM Mux Demux).


The "wavelength step between channels" is the main respect between these WDMs. For example, although it is 20nm (CWDM process, but for DWDM, this is usually 0.8nm (dense).


But here, we will discuss the latter, DWDM technology: how it works, its advantages and disadvantages (if any).


DWDM technology is dedicated to integrating multiple signals of different wavelengths on the same optical fiber. This technology is the result of long-term efforts to find better solutions to meet the increasing demand for efficient and capable data transmission. It uses different colors (wavelengths), and these colors (wavelengths) are integrated into a device called Mux/Demux, which stands for multiplexer/demultiplexer. These devices are designed to integrate and isolate signals separately. The multiplexer is used at the feeding end, and the multiplexer is used at the receiving end.


Since the function of Mux is to select one of several input signals and send it to the output terminal, it is also called a data selector. It acts as a multi-input and single-output switch, sending optical signals at high speed through a single optical fiber cable. It eliminates the need to use multiple devices for different input signals. With Mux, it is now possible to send large amounts of data at higher speeds over the network.


Conversely, Demux with one input and multiple outputs can send one input signal to one of multiple devices. Its main purchase is to receive signals containing multiple optical frequencies and separate them into their frequency components.


The DWDM multiplexer/multiplexer module provides the advantages of DWDM technology in a fully passive solution. They are very suitable for long-distance transmission. In fact, as long as you choose the right one, they have many benefits. In order to take full advantage, you should purchase DWDM multiplexers/multiplexers from FiberWDM, which is known for providing various high-quality optical fiber products in China.


FiberWDM produces various types of WDM Mux Demu. Such as DWDM Mux Demux, CWDM MUX DEMUX and Passive WDM Component. Provide product samples, OEM and ODM services! Welcome to consult!


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